Daylilies are perfect for gardeners looking for low-maintenance flowers because they require very little maintenance. Despite how simple they are to maintain, daylilies do have a few issues that could harm or even kill your plants. The biggest problems with cultivating daylilies were something we wanted to examine in greater detail. The American Hemerocallis Society, the recognized authority on daylilies, provided the following details.
Pests
The good news is that daylilies have very few pests, and those that do exist rarely cause serious harm. Spider mites are among the most prevalent pests of daylilies. They can be somewhat controlled by simply hosing them off, despite being most active in hot, dry weather. If necessary, a pesticide free of Kelthane can be used because Kelthane is poisonous to daylilies.
The bad news is that daylilies have an aphid that is unique to the flower and, in contrast to conventional garden aphids, is difficult to eradicate with substances like soaps. In temperate regions and the subtropics, these pests often become active during cool weather. Pesticides must not contain kelthane and must at least have a moderately systemic activity.
Thrips are yet another hazard to daylilies. The most effective way to control an infestation is to use a pesticide free of kelthane that is sprayed early in the growing season and has either a long residual effect or systemic activity. It is known that slugs and snails feed at night on the developing tissues of daylilies, causing holes and torn edges. Slugs and snails hide during the day in cool, moist areas like mulch, dead vegetation, or under rocks and bricks. Sanitation and pesticides designed specifically for snails and slugs are two means of control. Daylilies are also reported to be harmed by cutworms, wasps, tarnished plant bugs, Japanese beetles, grasshoppers, cucumber beetles, and cicadas. Even the blossom buds might be tasty to deer.
Diseases
If illnesses are harming your daylilies rather than bugs, you may be experiencing problems with them.
While some diseases, such as crown and root rot, are straightforward for the home gardener to identify, others are more challenging. Even a professional laboratory diagnosis could be necessary for these. As it is possible to mistake “summer hibernation” for plant sickness or death, it is imperative that a gardener be able to comprehend what is typical for daylilies and their growth.
Plant browning and collapsing, leaves that are easy to pull out, mushy tissue, or plant mortality are a few signs that your daylily may have crown or root rot. These diseases may or may not have a bad odor. Shoestrings for Armillaria rot and mustard seeds for southern blight (Sclerotium rolfsii) are examples of possible outward signs of fungi. Diagnostic laboratory tests could offer a precise diagnosis if the condition was unclear. In addition to a fungus, bulb mites, nematodes, bacterial infections, gardening methods, weather, moisture, and soil aeration can also induce crown or root rot. Some cultivars could be more prone to crown or root rot, similar to daylily rust. These illnesses are a concern in warmer climates even if they may arise in cooler ones. The use of sufficient airflow, soil aeration, and appropriate drainage are treatments. Additionally, you must refrain from overfertilizing plants, drowning them, or modifying the soil with very water-retentive organic components. Avoid transplanting flowers during hot weather or planting them too deeply. Allow wounds to air-dry after separating plants before replanting. For the best course of action if the rot problem persists, a laboratory diagnosis is advised.
Some daylily illnesses, such as daylily rust, are brought on by fungus. The rust-causing fungus, Puccinia hemerocallidis, causes orange-yellow powdery flecks to form on leaves and scapes. Orange-yellow spores can be visible when white tissue is used to wipe leaves. The plant should survive even if the rust results in leaf dieback. Compared to other cultivars, some are more susceptible. Treatment measures include allowing enough space between plants, ensuring optimum airflow, and minimizing overhead watering. Avoid consuming too much nitrogen and insufficient potassium. Fungicides that are appropriate can be used if necessary.
Leaf streak is a different condition brought on by the fungus Aureobasidum microstictum. Yellowing streaks, brown blotches, and die-back of leaves without plant death are symptoms of this disease that can be identified. The removal of leaf streak may be facilitated by the use of suitable fungicides.
We felt it was crucial to include our final issue in this topic, even though it may not be a sickness at all and its precise etiology is uncertain. Daylilies that have spring illness exhibit discolored, twisted, bowed, or stunted leaves on some of their fans in the early spring, according to AHS. It’s unclear whether recovery and typical blooming will take place that season. This daylily problem could be caused by a number of things, including leaf streak fungus and bulb mites. Damage caused by the cold after shoot emergence is not the cause, though.
Who or what is consuming my daylilies?
It’s difficult to deny how stunning you are. No matter how often I may have seen you, I still find myself gasping for air anytime I catch a glance of you.
But Deer, I have to get this off my chest. There is no simple way to say it, but you’ve started to drag a bit. You believe that everything is yours to possess. I spend HOURS planting daylilies, shrubs, and trees, yet you just show here and eat them all up in a matter of minutes. I don’t know how many times I can say I planted these things because I want to see them blossom without being impolite, but I did. I plant flowers because I adore them and because I want my garden to look attractive. YOU ARE NOT FOR THEM!
I suppose I’m trying to suggest that the days of eating salads are finished. It’s true that I still gasp when I see you, but now it’s with dread rather than amazement. I apologize if it offended you, but sometimes the truth can sting. I don’t want to see you anymore, in case you didn’t get the hint. Do not enter my garden. Do not enter my flowerbeds. Most importantly, AVOID MY DAYLILIES.
Observations from Stewart Oakes
“Deer have become a bigger issue for homeowners in various parts of the country. Deer will consume the entire daylily plant, including the buds, flowers, and leaves. They will approach the edge of your house and devour the foundation plantings if there is no other food nearby. Even plants like rhododendron and, here in the south, okra have reportedly been consumed by them.
Even the classic wayside plant, h. fulva, is not secure; we have yet to discover daylilies that are resistant to deer. Commercial deer repellent sprays are available, but they can be pricey and require repeated application. We provide you with a home-made spray recipe. It is reasonably priced.
Daylily hybridizer Paul Chupka of Mifflinville, Pennsylvania, provides the following instructions for a deer-free garden:
Place in a blender and add enough water to cover. Double strain after blending. Shake the contents into a two-gallon sprayer.
*Please note that we have not personally tried this recipe.
We do lose a few daylily buds to deer each year, but not enough to make us feel obliged to spray. We don’t use anything to keep deer out of our fields.
Do rabbits consume daylilies?
- Shovel
- Spade
- pulverized red pepper
- Garlic with onions
- spicy food
- purified, spring, or filtered water
To plant in your garden, choose flowers that are resistant to rabbits and deer. Astilbe, daffodils, marigolds, snapdragons, daylilies, primrose, and peonies are some flowers that rabbits and deer typically avoid eating.
The lovely flowers that keep deer out of your garden are the snapdragons.
Your flowers that are resistant to deer and rabbits should be planted in an appropriate location. In a location that receives six to eight hours of direct sunlight each day, plant flowers with the label “Full Sun.” In a location that receives up to four hours of direct sunlight each day, grow flowers marked “Partial Sun.” Choose a planting place that offers your flowers the right amount of sunlight and has well-draining soil.
Do mice consume daylilies?
Voles do devour daylilies and they appear to eat as much as they dig. These treasured plants are particularly sensitive in their roots and bulbs. You certainly have solutions to keep burrowing rodents away from your daylilies if they are destroying them. Choose the strategies that work best for your situation, such as killer cats or barrier protection, to prevent voles from turning your daylilies into a snack. Although hardiness varies by species, daylilies (Hemerocallis spp.) often grow outside year-round in U.S. Department of Agriculture plant hardiness zones 3 through 10.
Are daylily blossoms edible to deer?
Crocuses, dahlias, daylilies, hostas, impatiens, phlox, and trillium are among the herbaceous plants that deer frequently consume. Some people refer to the tulip and lily flowers as “deer bon-bon candy.”
What are my daylilies dying from?
Root-Knot Nematode: Daylilies that are infected by root-knot nematodes (Meloidogyne species) may experience vigor loss and rapid decline. Plants that are infected slowly degrade, grow slowly, get stunted, turn yellow, wilt, and frequently perish. The signs are quite similar to those of moisture stress. Where the worms feed and inject toxins into the roots, there are frequently tiny lumps or nodules.
Sandy, wet soils are where nematodes are most prevalent. On formerly used cropland that has been converted to residential usage, they are typically more of an issue.
Prevention and treatment: Plant samples may be sent to the Clemson Plant and Pest Diagnostic Clinic through any county Clemson Extension office for confirmation if root-knot nematodes are detected in residential landscape beds. Because the root-knot nematode clearly galls plant roots, whole plant samples should be submitted rather than soil samples for tests like those for other soil nematodes.
Choosing plants that are resistant to the root-knot nematode is the best course of action. Infested plants should be removed and disposed of; they should not be added to the compost pile. Please refer to HGIC 2216, Root-Knot Nematodes in the Vegetable Garden, for more details on the signs of root-knot nematode damage and on how to control them.
Soft Rot: In the rhizomes and at the base of daylily flowers, Pectobacterium carotovorum causes bacterial rot. This soft rot-causing bacteria is a typical soil habitant. High temperatures, inadequate airflow, water retention in the soil, and insufficient fertilization all encourage the growth of the soft rot disease. Daylily plants with soft rot may have a strong, unpleasant smell coming from the crown (or base).
Treatment & Prevention: Avoiding soft rot
- By adding organic matter to heavy clay soils, you can prevent poor soil drainage (such as with composted pine bark or compost),
- Avoid regions with inadequate air circulation around plants (prune back over-hanging shrubs),
- Prevent problematic planting areas (do not plant susceptible daylily varieties in the same spot where other plants have shown soft rot symptoms),
- before sowing, let injured plants recover (cork over), and
- Plants shouldn’t be over-fertilized or over-watered (avoid over-head irrigation)
Squirrels consuming daylily?
Yes. Animals enjoy the flavor of lily bulbs (and people, they are grown as a food crop in China). The squirrels won’t get them if you place them deeply, but moles and voles can. All lilies, with the exception of a few (Candidum, Pumilum, Cernuum), should be planted 8 to 10 inches deep. This is advised because lilies are “stem rooting” and require the stem roots to secure the stem and assist feed the bulb (plus its where you get little bulblets). But it also irritates the squirrels, which is a benefit. For a squirrel to descend 8″, they would need to be very large. The tunnelers are a unique case. This year, I’m planting daffodils around my lilies in my back bed in the hopes that they will deter moles.
Are daylilies immune to deer?
I have numerous daylilies in a wide range of hues. They thrive in the sun and make excellent flowers that are resistant to wildlife. Even though I have daylilies planted right near to the boundary of our “lot,” next to a cornfield, and next to a wooded area where I frequently see deer, they go unharmed, despite the fact that I am aware that deer can eat these plants.
Even though they thrive well in the partial shade where they are planted, my daylilies don’t blossom as aggressively there. They bloom periodically throughout the summer because they are perennial plants. As early as the end of May and as late as the beginning of September, mine can bloom. They are available in a wide spectrum of hues, including yellows, oranges, reds, pinks, purples, and others.
Daylilies appear to grow quickly. Most of mine were planted when they were only one “fan.” They already had to be separated, and I’m currently dividing some of them again, five years later.
They swiftly emerge in the early spring before blossoming and resemble beautiful grass. I remove the worn-out growth in the late fall, and nothing is visible all winter.
Can daylilies regenerate after being eaten by deer?
Depending on the extent of the deer damage, daylilies may or may not recover after being eaten. If the plant loses all of its foliage, it might not recover, especially if the damage occurs early in the growing season. Daylilies gather energy throughout the growth season to use the next year. The plant cannot get ready for the following year if it loses all of its leaves.
If daylilies keep some of their leaves, the plant can continue photosynthesis and process sunlight.
Agricultural Experiment Station in New Jersey, “Landscape Plants Rated by Deer Resistance,” 2018
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How can I prevent bunnies from consuming my plants?
- Given that rabbits have such keen senses of smell, sprinkling powdered red pepper throughout the garden or on certain plants may deter them.
- It has been suggested that scattering shavings of Irish Spring soap throughout the garden in small drawstring bags can deter rabbits.
- By blending three fiery peppers, three sizable onions, and a whole amount of garlic, you can make a foul-tasting rabbit cocktail. Overnight, cover with water and place in a container. After straining, mix the ingredients with a gallon’s worth of water. Spray plants again after a rainstorm. Try commercial goods made with strong garlic oil as well.
- Spray one teaspoon of Lysol and one gallon of water around your plants.
- Some individuals use individual “tin can collars” or screens to protect plants, allowing them to grow to a less vulnerable size. For safety, wrap the collar around each stem.
- Use hardware cloth cylinders with a 1/4-inch mesh to prevent rabbits from nibbling on young fruit and ornamental trees. The cylinders should stand one to two inches away from the tree stem and be higher than a rabbit might reach when standing on the anticipated depth of snow.
- Some odor-based deer tactics are claimed to also be effective against rabbits. Commercially marketed deer repellents that combine dried bovine blood, sulfured eggs, and garlic will keep rabbits away.
- Try an old-fashioned rabbit cure and scatter big, clear glass jars of water throughout the garden. According to legend, rabbits are afraid of their own reflection. Reflectors and other items are offered by garden centers. Bunnies can be scared away from your plants with the help of lurking cats, phony snakes, and ominous owls.
- Humane traps can be the best option in some situations. (Take note that it can be against the law to capture and release wild animals in your region.) Consider creating a trap if you don’t want to purchase one. Put the trap in the area where you’ve noticed the rabbits eating or relaxing, then cover it with a canvas. Apples, carrots, cabbage, and other vibrantly green fruits and vegetables make great lures.
Plants That Rabbits Dislike
Experts on bunnies claim that rabbits have specific plant preferences based on a variety of factors, including flavor, nutritional value, the presence of poison or prickles, and accessibility. Not all plants are suitable for all rabbits because their interests in diet might vary by place and season. Be cunning and take care of plants that rabbits don’t find particularly appealing.
Rabbits frequently steer clear of certain plants that deer and Japanese beetles do. Check out our lists of deer-resistant plants and best and worst plants for Japanese beetles to learn which plants might work best for controlling all of these pests. For rabbits, pick plants like forsythia, lilac bushes, zinnias, daffodils, lavender, and snapdragons. Your rabbit population might be reduced as a result of this. Although planting these plants in your garden may make it less enticing than another, this is not a guarantee because hungry rabbits will consume practically anything. Additional plants that rabbits don’t like include: