Be mindful of lily bulblets.

Oriental bulblets in spring.

As you well know, not all green leaves emerging are weeds.

What are those odd looking single leaves at the base of an established lily?  Lily bulbs have a built in process for creating offspring; tiny nodules may form at the base of the bulb (basal plate bulblets), along portions of the underground stem (stem bulblets), or even with a few Asiatic lilies, at the base of a leaf where it attaches to the above ground stem (aerial bulblets).

The leaves shown in the right photo are of Oriental bulblets.  They typically will be wide and slightly rounded.  The bulblets under ground are not much larger than the eraser on a pencil.




Basal Plate Bulblets

'Candlestick' Basal Plate Bulblets.

This is the most common way for a lily bulb to divide, by simply forming new growth at the bottom of the bulb.

See the three large bulblets at the base of this bulb of 'Candlestick'?  They will put up a small stem, with one flower each.

Asiatic lilies and Lilium longiflorum hybrids are quicker to divide, sometimes three or more new bulbs can form each summer, which may bloom for you the following year. 

'Belonica' double-flowered Oriental.

Oriental Lilies

Oriental lilies can be erratic for propagating, only producing side bulblets on some cultivars if the growing season is good, and enjoying even amounts of moisture, fertilizer and fluffy soil to grow an expansive root system.  The usual method of quickly increasing bulbs is to "scale" the lily in fall, see "Scale Production" on our website.

Most Oriental bulblets grow slower than Asiatic hybrids, usually needing three years of additional care before they mature enough for us to offer on www.bdlilies.com.

'Donato' Orienpet lily.

 

 

OT Lilies

 

OT (Orienpets or Oriental-Trumpet Hybrids) have similar growth patterns as do regular (purebred) Oriental lilies.  They make fewer basal plate and underground stem bulblets (see below), and therefore take longer to propagate commercially.  Most years, bulbs will simply get larger and larger, until they naturally divide into two or three flowering size bulbs.

 

Purebred Trumpet lilies are similar, and after a few years of growing undisturbed, can be the size of a small cantaloupe. 

 
Stem Bulblets - on all types of lily bulbs

Asiatic bulblets along the underground stem.

Attached to the underground stem, and tucked within the new feeder roots produced every year, offshoots (bulblets) are an exact genetic duplicate of the original flowering bulb.  

These are easily removed in fall after the foliage has matured from green to brown and winter is approaching.  Simply pull the old crispy-brown stem out of the ground and gently dig down above the mother bulb to harvest the bulblets.

Choose a protected nursery bed with only 2 or 3 inches of soil covering the tops for the first year.  After the garden has frozen for winter, add a bit of mulch so you do not forget where they are planted. While we are harvesting bulbs in fall, bulblets are saved either for propagation or to sell as a mixed bag of bulblets at flower shows in spring. 

Arial bulblets are the little black colored offshoots that grow at the base of each leaf on an old-fashioned, orange colored tiger lily (Asiatic).  Some modern hybrids that have it in their breeding background will also exhibit this trait.  We do not grow "Tiger" hybrids here, partially because any bulblets that drops off the stem, or are missed during harvest will grow, causing all sorts of havoc.  There would be out of place, rogue lilies in the field two years later as they begin to grow within the carefully planted row.  However, the primary reason for not growing them is because they can be a "Typhoid Mary" in the garden.  See our Knowledge Base, Lilium lancifolium for more information.)

See  Dig 'n Divide - Lilies for Fee - Easy How-to  on our website, www.bdlilies.com

Shady Areas and Lilies

Martagon lily in deciduous woodland

What sort of shade matters.

What kinds of plants do you have growing in your shady areas?  Grass, Hosta, primroses or violets?  Does the sun shine directly for an hour or two?  Do tall deciduous trees filter the sun, creating patches of bright indirect light that move around depending on the hour?

The area in this photo on the left receives 2 hours of direct light and is somewhat moderated by waving tree branches overhead.  Before a pine was removed last summer, there was no direct sunlight.  The plants flowered, but the foliage had never looked as nice as shown in the photo, because now the stems have slightly more light.

Sunshine is more intense in southern regions, high plains, and mountain areas.  Lilies that will happily flower in the shade of a tree with a dense canopy of leaves in a southern states may not do so well in cool maritime climates.  If the light is too dark, the result may be lily stems doubled in height, plus leaning dramatically towards a brighter light source.  Although pretty, the flowers will not be evenly spaced around the top of the stem.  This is not necessarily a problem in the garden, but that stem would not receive an award in competition, because the flowers would not be balanced.


 

'Pearl Jennifer' - available for order in 2015

Which lilies for where?

All lilies can flower just fine in dappled shade, bright indirect light or with a half day of full sun.  If you have a choice between morning sun and afternoon sun, pick the gentler Eastern (morning sun) location.  Afternoon sun is more intense and will tend to cause stems to face the sun, whereas planting lilies in full morning sun results in straighter stems and more evenly spaced flowers.

Watch the flowers to see how much shade they can tolerate.

Martagon lilies, because of their more delicate leaves and early blooming nature, are most at home in lightly shaded wooded areas where the delicate looking tiny flowers are spaced further apart and the stems lean towards the light.  In full sun, buds are tighter together, which makes a lovely stem for competition.

Oriental lilies prefer afternoon shade in warmer regions with long summers, such as in the more southern states. Upward facing flowers on Asiatic lilies are usually not as graceful looking as Orientals or Trumpets when leaning toward the sun on account of too much shade.


If stems "stretch" more than you like, you can either stake the stems or move bulbs to a sunnier location in early winter.  In Mountain areas or other short-season climates, where soil takes a long time to warm in spring, either plant in full sun to allow enough time for lilies to mature their leaves before an early winter—or only plant early-blooming Asiatics.

'After Eight' - shorter clones have limited bud counts.

Consider shorter growing varieties for shade.

In shady areas, choose shorter growing lilies, ideally not more than around 3 feet tall when grown in full sun, or you may end up needing to stake the stems.  Outfacing or pendant type flowers can be very attractive, even when the stem is leaning.  However, strongly upfacing flowers on taller-than-normal stems in shade will not be as pleasing, especially if the flowers are too high up and out of sight.

One thing to consider however, is that the naturally dwarf Oriental clones (two feet or less in height) tend to max out with only 3 to 5 flowers on a stem, even after becoming established in the garden, as opposed to their taller cousins that usually have larger flowers or more numerous blooms.  Therefore, you need to weigh the options carefully and perhaps choose medium height lilies (3 to 4 Feet) that are outfacing or are slightly up-facing and will not be damaged by low growing, overhead tree branches.

One solution for "too tall" is to plant at the edge of moderately raised deck (not second floor) where the flowers can peek over the rail.  This also works for established trumpet lilies, such as 'Pink Perfection', 'Golden Splendor', 'African Queen' and 'Lilium regale', that can top six feet in height after a couple of years, even in a sunnier locations, not just light shade.

At ground level, avoid rank-growing, invasive plants or perennials which smother emerging sprouts in the spring, in addition to overhanging trees and shrubs which steal light and nutrients.  If a network of tree or shrub roots is too dense to easily dig in an area you have chosen to grow lilies, consider planting the bulbs in pots.  Simply grow behind a garage or other out of the way place - then when the buds are just starting to open, arrange the potted plants near your outdoor living area or under the trees.

Full sun is best for 'Firebolt' because of the dark color.

Color selection is important.

Pale to medium tints of pink and yellow, as well as pure white and bi-colors show up best in part sun areas, even when viewed from a distance.  Varieties like 'Ormea', 'Nymph' and 'Bonbini' excel in light shade because there is enough light reflection to make them "pop" in the garden, plus they add a hint of color for interest.

Dark colored lilies like 'Sumatra', 'Rio Negro', and especially the mahogany-red 'Firebolt' are most effectively showcased in full sun.  (The photo on the right was lightened to show color contrast with the soil.)   Deep colors are not very good in low-light conditions—your nose may be aware of the fragrance—but the flowers will tend to blend into the background.

Eastern exposures and very bright indirect light is fine in all areas with any color, especially with lighter colored plants, since there is enough color contrast for a stunning display and stems will tend to grow straighter and more compact.

'Salmon Star' - good for pots.

Growing Lilies in Pots.

Is your ideal lily growing area in the wrong spot?  Does your entire yard have too much shade and the only sunny area is behind the garage or next to the trash can?  Growing lilies in pots may be a solution for your garden.

Keep the pots in sun until the buds begin to open, then move them to an outdoor living area for fragrance and color.  When the flowers have finished blooming, move the pots back to your sunnier area so the leaves can photosynthesize to mature the bulbs.  Winter protection for containerized lilies is very important, click on the link below to learn more.

Potting Instructions
Winter care of potted lilies

Guidelines for Winter Protection of Lily Bulbs

Cold Winters - Midwest & Northeast
Although moderate climates only require enough mulch to reduce winter weed germination, colder climates need a bit more attention. In colder areas of Wisconsin, Minnesota and other Northern Tier States, gardens can experience very cold temperatures with frost levels greater than 5 feet and without enough snow cover to prevent the loss of rose bushes, trees, shrubs and other “above ground” plants. Protecting lily bulbs under such trying conditions is easy if the ground is properly mulched.  In the severe winter climates you MUST place an insulating layer of straw, ground leaves or other material over all Trumpet, Oriental, OT Hybrids or species where gardens are subject to deep freezes (generally colder than -10o F.), this is especially true if a good snow cover is lacking or not expected. Asiatics do not usually need extra protection, but all other lily bulbs in the Midwest, Northeast or Mountain states should be covered for protection.

In early Spring, remove the mulch in layers as the ground thaws and warms, to evaporate rainfall (or snow melt) as quickly as possible.

Too much sudden moisture can cause your bulbs and sprouts to rot. If lilies are planted at the top of a ridge or small hill, frost will not settle on the plants, so those areas may get by with less mulch  Avoid soggy, wet areas as well as low spots where frost will be heavier in winter.  A good layer of mulch may consist of 8 to 12 inches of straw or hay, tree boughs or other fluffy material. Avoid compacted, whole leaves or wet grass clippings because these have the potential to hold too much moisture around your underground bulbs and the sprouts will rot in spring if you do not remove the mulch fast enough. Shredded leaves are better because they allow air movement and are easier to remove in spring.


Wet Winters - Southern & Coastal States
In mild climates, be very CAREFUL about mulching newly planted bulbs if you were affected by an unusual amount of rainfall last winter or spring, that resulted in your garden becoming overly saturated.  Lily Bulbs by their very nature are designed to store water for times of drought; plant on a slope or in a slightly raised bed to avoid flooding—they do not swim well and will suffocate if the soil stays constantly soggy over winter.  Moisture replenished from rainfall on a daily basis is OK just as long as it is draining away quickly and not sitting stagnant.  During cold and wet springs, a thick mulch over lily bulbs may cause the sprouts to decompose while still underground or as they begin to emerge. (See Fungus: Stump Rot (Phytophthora) on our website under “Problem solving - Animals to Weeds”.) In moderate/mild Southern and Coastal areas, use only enough mulch (one or two inches) to suppress winter weed germination, especially if this winter is expected to be wetter than normal.

During very moist winters, if the soil surface is not allowed to dry between rainfalls and the garden remains saturated, you will risk losing even established bulbs. 

Use a porous mulch (e.g. straw or large nuggets of bark) will allow your soil to breathe and dry faster. Go easy on compost; only an inch or two on top of the soil is recommended per year.  Your goal is not deep freeze protection as in the Midwest or Northern states, but rather a tidier garden.

Gardeners in maritime areas of the Pacific Northwest, that are subject to large amounts of heavy rainfall over winter and into June, need to be especially careful about using bark, shredded leaves or other decorative materials in winter.  Add a new layer to your garden in spring after wet snow and/or heavy rainfall has diminished and just before the new weed seeds begin to germinate, which will keep the garden looking good all next summer.  It is important to allow the soil surface to dry properly between storms. For good looks, freshen your mulched garden in June, after the wet and cold weather has settled and the days have become drier.



NEW - Alaska & Gardens at High Elevation
(Not printed in the Planting Guide.) Planting in the garden is preferable (See Midwest & Northeast Instructions above), but customers in the far north sometimes pot up lily bulbs for winter and keep them in a colder area until spring.  These instructions are important should the soil suddenly freeze too hard and deep before our bulbs can be harvested and mailed in mid October.  Strategies include placing lily bulbs planted in pots with moist—not saturated soil—in the crawl space under their house or wrapping them in pink fiberglass insulation in an attached, cold garage or protected shed over winter.  A heavy cover of insulating snow also helps to moderate the temperature so that the soil surrounding the pots slowly freezes around them.  Quick freezes or freeze-thaw conditions all winter will leave lily bulbs looking like a frozen, thawed onion—limp and not viable.

Do not store pots in a greenhouse or root cellar that stays warm over winter OR is allowed to experience quick freeze-thaw conditions.

Lily bulbs need 8 to 10 weeks of cold, preferable below 35 degrees F. to reset themselves for bloom the next summer.  If they do not have enough cold treatment, they will either emerge weak and spindly or simply grow leaves and not bloom.  Should pots be stored in an greenhouse that stays constantly over 40 degrees day and night, the bulbs will also not bloom well either.  Modern hybrids are derived from wild lilies in temperature climates, where the soil slowly freezes deep over a period of time or the soil regularly only freezes a few inches below the surface each winter.  If stored in an unheated greenhouse, where the temperatures drop below freezing at night, but warm up to above freezing on sunny days, the freeze-thaw will compromise the integrity of your lily bulbs and they will most likely rot before spring.

Your goal is to allow soil surrounding the lily bulbs to slowly freeze.  We do the same in our winter coolers.  Wet peat surrounding the bulbs is frozen solid, which in turn slightly freezes the lilies in place and mimics a natural winter.  They stay in this dormant frozen state with proper hydration and the cooler air temperature is just a degree above freezing, until the cases are removed and prepared for shipping across the USA in April.  This is not something you cannot do at home, because the lilies need to be in a large block of soil/bulbs (about 45-50 pounds) to be protected and the air temperature is dropped only a few degrees each week.  Home freezers are designed to freeze solidly to zero or below within a few hours, which would turn the lily bulb to mush upon thaw.

Planted in a well-drained garden, soil freezes at a slower rate and acts as a buffer.  If you are lucky to have a good snow cover as well, your sleeping bulbs are quite happy.  If in those odd years of either no snowfall or snow that comes and goes over winter,  a thick mulch (foot or so deep) of shredded leaves, cut evergreen branches, bark or other insulating material is in order.  Avoid whole, large leaves (like Bigleaf Maple) because they will tend to mat down and become slimy.  Remove the layers as the snow melts to allow soil to slowly warm and wake up your lilies.

Also see:  Hardiness for bulb types and a brief Planting Guide for bulb depth on this Blog.

Planting Lily Bulbs on their side... for Water Control?

Has anyone ever suggested to you that lily bulbs should be planted on their sides to "keep them from filling up with water" over winter in heavy clay soil?  Does it work?


Physiology of a Lily Bulb

When lily bulbs are dug, and where the old flowering stem was located, you can see a neat and tidy "hole".  Lily bulbs are composed of overlapping "scales" attached at the basal plate (bottom of bulb).  Water washes through the lily bulb to the roots, which is sort of like a kitchen bowl with a crack in the bottom—it holds water for a period of time, but eventually the water completely leaks away. 

Lily Bulbs do not swim well.

• Your goal is to have water move freely and quickly from the soil immediately surrounding the bulbs, so they will not be subject to rotting over winter and early spring. 

• Sluggish drainage—caused by tightly packed clay soil—creates saturated soil for an extended period of time, which results in a depletion of oxygen and danger of loss over winter/spring.  

• Frequent heavy rainfall with fast draining soil provides oxygen to the plant tissues, which is not a problem in sandy loam because the water drains quickly away from the bulb itself.  

• Planting lilies on their sides into clay-based soil still doesn't do anything to improve the drainage, you will still have over-saturated soil. 

• Digging a larger-than normal hole in clay soil, then refilling it with commercial potting soil doesn't work either—the hole acts as a slump and quickly fills with water. 

The solution for clay-based soil is a slightly raised wide mound or berm, where the bulb is above natural ground level.  The lily roots may penetrate further below and into the natural clay, but the bulb itself stays drier.
 

What is going on underground?

There's more going on under the soil surface than most people ever suspect.  While being tractor-planted, many bulbs will either land upside down in the soft soil, or sideways.  Lilies have "contractile roots" on the bottom of the bulb, which helps to anchor the lily from upheaval by wind.  They will frequently turn themselves right side up as the new roots grow deeper into the soil, but some may take another year to become fully upright. 

In the photo below, the roots on the left are contractile basal plate roots.  Do you see how thick they are?  The ones growing above the bulb are stem roots, which being just under the soil surface, take up nutrients, the reason why fertilizer is spread on top of the soil, not mixed into the bottom of the planting hole.  Basel plate roots can persist from year to year, stem roots are grown new each year with the new stem.  By the way, there is no need to wash transplanted bulbs before planting, this photo was just to clearly show the two kinds of roots.  Tiny bulblets—offshoots of the original—will nest within the tangle of roots, if that variety is so inclined and make new, full-sized bulbs for you within a few years.

Not all lily bulbs produce stem bulblets.  Some, like this Orienpet, just keep getting bigger until they divide into two.

The next photo shows an Asiatic lily that was laying on its side when planted (in spring), and the sprout traveled underground for over a foot before turning up to make a stem above ground.  The rock on the right is there to prop it up and show how the now-browned stem emerged from the soil. Had it been planted upright to begin with, the plant would not have expended as much energy underground, and would probably have had a taller stem with more flowers that year. 

Digging this one was a chore, the stem just kept going off into its neighbors.

The Bottom Line

Correct any poor draining soil and put the bulb, so the roots are downward, with no need to put them on their sides.  Even if you make a mistake and accidentally plant them upside down, the stems will still find their way to the sunshine.


Related Blog Postings: 
Semi-automated Planting of Lily Bulbs
Clay Soil and Lily Bulbs
Bulbs planting upside down?  No Worries.
When Mother Nature is Generous with Rainfall

Photo Instruction for Dividing a Lily bulb.

Lily bulb that produced two flowering stems over summer.

See how the original easily separates into two bulbs?

One of the questions that comes up when folks want to divide overgrown clumps of lily bulbs is where do I "cut" them? 

No cutting is necessary, because lilies actually are quite easy to divide. 

Look for a natural division where two bulbs are attached to each other.






 When a lily bulb is ready to divide, a simple pulling apart of the bulb is all it takes.  If you find resistance, don't try to force them, simply replant and let them wait for another season and two stems will emerge from each side.

After dividing, both bulbs will be flattened on one side, but each half is a self contained, flowering size bulb.  The one on the left has the bottom of the stem attached, the other stem fell out during harvest.

Let the bulbs air dry for an hour before planting back.

Two bulbs are now ready to plant, each with their own set of roots.

The hens in the background are part of our free-range chicken flock and were very interested in what I was doing.  Of course, that just simply means they were trying to determine whether or not any tasty corn (scratch) was involved.  Nope, not this time, and so they wandered off to check out the goose pen.

You do not have to be exact, this is just a guideline.

Plant your lilies back at approximately the same depth they were growing.  One and one half times the height of the bulb (up and down, not around) is the proper depth of the hole. 

This bulb is about 2 inches tall, so the hole will be about 6 inches deep, with about 4 inches of soil covering the lily bulb.

See the flattened side on each bulb?

If lily bulbs are ready to naturally divide on their own, we split them while they are being dug and cleaned, which is only one of the ways we propagate our lilies. 

Occasionally, we get a phone call that someone received "only half of a bulb", because one side was flattened.  Those may look a bit odd, but the lily is certainly a mature bulb, because it had already flowered that season.





Don't worry if you have one of these in your order, everything the lily needs for blooming next summer is already neatly packed inside.

How and When to Dig Lily Bulbs

Just a few yellow green leaves are left here.

Do you need to move lily bulbs out of the way of new construction, or have they outgrown their spot?  The best time to transplant lilies is when the leaves have turned from green to brown because at that time it is certain the bulbs have matured enough to safely dig. 

See how the leaves have mostly all turned brown in the photograph?  These bulbs have fully regenerated and are ready to go through their winter dormant period.  If dug too early in late summer, the bulb's are soft and can be easily damaged, plus it may be too small to flower next summer if they have not been enough given time to build themselves back up.

You can carefully dig when the leaves have all turned from green to yellow, but by waiting just a week or two more, when all the energy is safely stored, it will make a difference in the number of flowers produced next summer.

Don't begin digging too close to the stem or you risk cutting the lily bulb.

Carefully, position your shovel or garden fork about 4 inches away from the stem and dig down 7 to 8 inches to the side.  If you planted properly, the lily bulbs should be at least that deep, but if a clump of stems is older and overgrown, the bulbs may be closer to the surface, especially if yearly weeding has pulled away some of the soil.

Using the stem as a "handle", gently lift the bulb and root ball.  Pull excess soil from around the bulb with your fingers, or you can simply wash the bulb in a bucket of water, which is messier—but also effective.

The circle is where the stem roots are located.  The red line shows how deep the bulb was planted.  Not all bulbs will produce bulblets underground, but this bulb was only planted in the past spring, so it was still "settling in".

Use an old pair of hand pruners or a serrated kitchen knife if you have rocky/sandy soil.

Clip off the stem if it does not "fall off" easily on its own.  Green stems are still firmly attached inside the lily bulb and by yanking the stem out of the bulb, you risk damaging the center of the lily—opening up the bulb to decay and loss over winter.  Lily stems are attached by a "hook" and if the stem is too green, that hook will tear out the inside of the bulb.  Harvest any bulblets that were produced along the stem—inside the stem roots— or at the base (basal plate or bottom) of the lily and plant those separately. 

Bulb harvested and ready to plant back into the garden.

Plant back ASAP because lily bulbs do not have a hard exterior such as Daffodils or Tulips and they will dehydrate quickly if left unprotected by soil or other means.  In fall, we layer the bulbs in moist wood shavings until it is time to package and ship them to you, but without proper equipment for storage, try not to let them stay out of the ground more than a day or so.  In general, it is always best to dig the receiving hole before starting any transplanting project, even a couple of days earlier will be easier on you back and better for your bulbs, perennials, shrubs or trees. 

Related Posts:  Emergency Transplanting-Summer, Low Cost Ways to Increase your Lily Garden, Lily Companion Plants, Stem Roots, Mulching Lily Bulbs for Winter,
  

 

How to Increase "Red Wigglers" in your Garden

Worms under edge of manure pile.

Underground activity, although not visible, can be what makes or breaks your garden.  All species of garden worms, especially night crawlers, are quite useful for more than fishing.  These powerhouses create tunnels from the lower depths of your garden to the surface, aerating and leaving behind worm castings (poop), which allows better root penetration for your bulbs, annuals, perennials, shrubs and trees and more nutrients available to your plants. The loosened soil drains better and is easier on your back when planting new garden treasures.

Ever see night crawlers on the soil surface after a heavy rain?

Worms require moisture to stay hydrated.  For them to break down organic matter from the top few inches of your garden and make it accessible to plant roots, that means fresh water loaded with oxygen, not over-saturated and stagnant mud puddles.  During heavy rainfall, when the ground water is closer to the surface, worms rise.  The old fisherman's trick of heavy watering the night before a fishing trip mimics nature, in order to bring them closer to ground level for collection.  The easiest-to-find worms for fishing always seem to be a few inches below a moist (fresh) manure pile—a little messy and aromatic, but a good place to start looking for home-grown bait.

How to increase your worm population.

• Avoid the over-use of chemicals in your garden. When garden soil becomes sterile from using too much (or too many years) of easy to spread fertilizer, herbicides, fungicides or pesticides—and as more product is needed to reach the same level of effectiveness—worms die and soil loses its aerobatic properties.  Reasonable use of granular or liquid fertilizer would be only once or twice a year at most and generally provided only as a supplement for plants with specific requirements.  Use of a copper-based fungicide for Botrytis in spring or a sulfur spray in winter on fruit trees are accepted as organic in many states, of which are old-fashioned controls that are both inexpensive and effective.  Weed problem?  Consider only applying a "spot spray" of herbicide on tough hard-to-kill plants should the infestation be too large and hand-digging of deep roots is not practical.  Creepy-crawly bugs and beetles—most are beneficial and feed the birds—but some destructive types will need control for a good vegetable crop or beautiful flowers.  We do not advocate the use of pesticides in the garden if there is an organic solution of hand picking, trapping or even a less toxic spray available.  Yes, this can be more labor-intense or take longer to see results, but it is much safer for humans, animals, birds and our watershed reserves.

• Spread mulch/compost liberally around your large perennial plants, shrubs and trees, but go easy where bulbs are planted—don't end up burying them too deep by using a thick layer of permanent mulch.  (This is different than "winter mulch" that is removed in spring.)  Avoid using "shredded tire mulch" because it doesn't add any nutrients, or landscape fabric topped by decorative rock, which tends to create compacted soil, because there are no organics for worms to eat.  Grass clippings from the lawn that has not had weedkillers applied, fallen leaves (naturally small or shredded large ones), compost, and manure are all heaven to earthworms and the softened soil makes pulling weeds easy.  Worms break down large particles of compost and leave behind castings to further feed your plants.  If you do not have access to ready made compost, aged manure or fall leaves, consider growing a "green manure", cover crop of fast-growing grains, such as oats, buckwheat, winter wheat, etc., that can be dug in while soft and tender to improve your soil. (See our Blog posting;  Healthy Soil with Oats, not Weeds.)

• Keep your garden watered.  Clay-based areas allowed to go bone-dry over summer will have rock-hard soil because beneficial worms are not present in great enough numbers to keep it soft, friable and nutrient rich.  In areas of heavy rainfall throughout winter and spring however, go easy on mulch to allow your soil to dry between storms—so that bulbs, perennials and other low growing or dormant plants do not rot underground or at the crown (soil surface).

 
Start Now.

Oat cover crop in veggie garden about 8" tall and
ready to till into the soil.

.

Even if your garden has been mistreated in the past by a previous occupant or you are just beginning to prefer organic methods of gardening, the land can heal itself over time.  Be patient and do not give up.  Educate your neighbors who might be tempted to spread "death and destruction" along your boundary fence.  Explain the beauty of a simple compost pile for returning unwanted biomass—weeds, trimmings, grass clippings, etc.— back to the garden, encourage natural insect control by attracting birds, and allow worms to do their assigned task in life. 

Lily Bulb Hardiness & Warm Winter Tolerance

Colder climate leaves turning colors.

(The chart published by the USDA and complete interactive searching – link below – can be found on the website for the US National Arboretum, which is a good place to start when trying to determine in what type of climate you live.) 

"When researching your location, bear in mind that all map lines are not absolute and each garden has its own unique micro-climate."

Neighborhoods with many trees blocking wind, hills that "drain" away moisture faster, concrete bulkheads, sidewalks and driveways that tend to collect heat, as well as southern exposures will allow you to grow plants that might not be recommended for your area.  

 
General Guidelines - Lily Bulb Hardiness 

& Warm Winter Tolerance in Southern States

Tiger Babies Asiatic

 






Asiatics – Zones 1-9.  (Sweet Surrender, Tiger Babies, Lionheart, “Pearl Series”, etc.) No winter mulch is needed and they prefer colder winters to reset bloom.

Longwood Scented Asiatic

Scented Asiatics – Zones 3-10.  (LA Hybrids such as Red Alert, Nashville, Eyeliner, Party Diamond etc.) grow well in all areas, do not require as much cold to reset the bloom, and would not need an “artificial winter” in the fridge in southern areas.  They start to grow immediately in spring after thaw, which is very helpful during short growing seasons, but a hard frost in late spring could damage sprouts.

Muscadette Oriental

Purebred Orientals – Zones 6-9, colder with winter mulch.  (Casablanca, Star Gazer, Acapulco, Muscadette, Crystal Blanca etc.), but if heavily mulched for winter or with a good snowfall, down to Zone 3 or 4 easily. Oriental lilies dislike hot, dry areas, growing the bulbs in afternoon sun is recommended because the flowers will last longer.

Golden Splendor Trumpet

 





Purebred Trumpets – Zones 7-10, colder with winter mulch.  (Copper King Strain, Pink Perfection Strain, Golden Splendor Strain, “Angel Series”, etc.), heavily mulched, down to Zone 3 or 4, but can be subject to late freeze damage in May, cover emerging stems if temperatures below 30 degrees F. are expected.

 

Conca d'Or (OT)

Oriental-Trumpet Hybrids – Zones 6-9, colder with winter mulch. (OT hybrids like Conca ‘dOr, Cocossa, Tea for Two, Eudoxia, Scheherazade, Sweetheart, etc.), same as Purebred Orientals, down to Zone 3 or 4 if well mulched for winter, and seem to be more resistant to late frost damage, plus because of the “trumpet” genes, they do not require as much winter chill as Oriental lilies, thus are very suitable for southern areas and will take higher heat in summer. 

Triumphator (LO)

 Longiflorum-Oriental Hybrids – Zones 7-10, colder with winter mulch. (LO  hybrids like Gizmo, Triumphator, etc.), about the same as Purebred Trumpets and are suitable for southern areas that have higher heat in summer.  For colder areas and heavily mulched over winder, down to Zone 3 or 4, but could be subject to late freeze damage in May, cover emerging stems if temperatures below 30 degrees F. are expected.

 

Find your USDA Hardiness Zone  

The following are examples of USDA Zones in the USA and Canada, if your location is not listed, look at the average low winter temperature listed (Fahrenheit, not Celsius).  The general guidelines are based on average low temperatures. To open a new browser window access the interactive map click USDA Zone Chart

Zone 1--- ( Below -50 F) --- Fairbanks, Alaska; Resolute, NW Territories (Canada)
Zone 2a --- (-50 to -45 F) --- Prudhoe Bay, Alaska; Flin Flon, Manitoba (Canada)
Zone 2b --- (-45 to -40 F) --- Unalakleet, Alaska; Pinecreek, Minnesota
Zone 3a --- (-40 to -35 F) --- International Falls, Minnesota; St. Michael, Alaska
Zone 3b --- (-35 to -30 F) --- Tomahawk, Wisconsin; Sidney, Montana
Zone 4a --- (-30 to -25 F) --- Minneapolis/St.Paul, Minnesota; Lewistown, Montana
Zone 4b --- (-25 to -20 F) --- Northwood, Iowa; Nebraska
Zone 5a --- (-20 to -15 F) --- Des Moines, Iowa; Illinois
Zone 5b --- (-15 to -10 F) --- Columbia, Missouri; Mansfield, Pennsylvania
Zone 6a --- (-10 to -5 F) --- St. Louis, Missouri; Lebanon, Pennsylvania
Zone 6b --- (-5 to 0 F) --- McMinnville, Tennessee; Branson, Missouri
Zone 7a --- (0 to 5 F) --- Oklahoma City, Oklahoma; South Boston, Virginia
Zone 7b --- (5 to 10 F) --- Little Rock, Arkansas; Griffin, Georgia
Zone 8a --- (10 to 15 F) --- Tifton, Georgia; Dallas, Texas
Zone 8b --- (15 to 20 F) --- Austin, Texas; Gainesville, Florida
Zone 9a --- (20 to 25 F) --- Houston, Texas; St. Augustine, Florida
Zone 9b --- (25 to 30 F) --- Brownsville, Texas; Fort Pierce, Florida
Zone 10a --- (30 to 35 F) --- Naples, Florida; Victorville, California
Zone 10b --- (35 to 40 F) --- Miami, Florida; Coral Gables, Florida
Zone 11 --- (above 40 F) --- Honolulu, Hawaii; Mazatlan, Mexico