Milkweed grows as an herbaceous perennial in most areas, and the growth dies back when the weather turns cold, so Milkweed is not available during the winter months. Although deer are not keen on eating milkweed, it is not repellent to deer. Shop herbs plants including basil, mint, thyme, oregano, dill, chives & more. Working with others to conserve, protect and enhance fish, wildlife, plants and their habitats for the continuing benefit of the American people. Milkweed plants are also a favorite for animals like bunnies, rabbits, and other herbivores. Deer tolerant. Hack JB. Occasionally, leaf miners will munch on columbine leaves, but this usually occurs later in the plants life cycle. Happy in most soil types, it will spread but isnt aggressive and overwinters as reddish evergreen rosette. The cultivar flowers may be sterile, lacking pollen and/or nectar, which means they dont provide any food for visiting bees or butterflies. 11. In sections of Maryland, high concentrations of white-tailed deer have created a demand for deer proof plants. As the nectar of the milkweed plant is the most favorite food source for the monarch butterflies, therefore, they keep coming back for those nectars present in the flowers. In reality, though, there is no such thing. Authors: Megan Nelson, Livestock Outreach Program Manager and Diana Alfuth, Horticulture Outreach Specialist, UW-Madison Extension This plant has low severity poison characteristics. Doesn't get any easier than that! Some broad-leafed species that contain high levels of cardenolides include Asclepias asperula, A. labriformis, A. eriocarpa, and A. curassavica. While deer and rabbits are likely to leave Milkweed alone, you can take steps to protect your plants from foraging animals. Milkweed plants have a high reputation for being constantly struck by deers despite being known as deer-resistant plants. While milkweed can grow quickly, planting species local to your region and researching a bit about growing patterns is a good way to ensure it wont take over your yard. If you suspect someone has been exposed to milkweed and is having a problem, check the webPOISONCONTROLonline tool for guidance or call Poison Control at 1-800-222-1222. (Quick Answers), Does Lysol Repel Flies? If someone experiences eye irritation after getting sap in their eye, gently rinse the eye with room temperature water for 1015 minutes. Other insects, which utilize milkweed, are the large milkweed bug, common milkweed bug, red milkweed beetle, blue milkweed beetle, and bees. It is an important plant for generating food for the pollinators like monarch butterflies. While horses are most susceptible to milkweed poisoning, people often ask, Is milkweed poisonous to dogs? It is toxic to dogs as well as chickens, cattle, sheep, cats, and some insects. Deer may nibble on anything once, especially when hungry, but they do dislike aromatics, prickly leaves and thorns. Provide adequate, good-quality forage for your animals. -USDA. Unfortunately, even though milkweed is recognized as a poisonous plant, there are multiple websites that provide recipes for the preparation of fried milkweed pods, milkweed shoots, and milkweed elixir. This gives the caterpillars a bitter taste that makes them distasteful to most predators! In this article, we are going to sort out the answer to this question. Wild bergamot (Monarda fistulosa) and other Monarda species are reliably deer resistant and have exceptionally showy, long blooming flowers. So, dont be surprised if visiting deer take a few bites from your showy milkweed plants. The whorled milkweed is harder to spot because of its thin stems and leaves. If there are any persistent skin or eye pain or symptoms, seek medical examination and treatment. Bluestem goldenrod (. ) Deer Resistance and Protection, 27 Deer Resistant Vegetables and Veggies Deer Wont Eat, Are Zinnias Deer Resistant? Intoxication of sheep exposed to ozark milkweed (Asclepias viridis Walter). This issue includes information on spring visitors like flower fliesa pollinator and a predatoras well as a beautiful nativegroundcover, moss phlox. Sometimes they also go for the fruits and flowers as they are very tasty due to their nectar and pollen. This page contains affiliate links to products on Amazon. This flowering perennial is toxic to most animals, including cats and kittens. Vet Hum Toxicol. Tour routes of great scenic drives on National Wildlife Refuges. You can simply plant highly deer-resistant plants around your milkweed plant. Cardiac glycosides disrupt proper muscle (including the heart) and kidney function, the nervous system and the bodys acid-base balance. Reportedly, some deer have developed a taste for milkweed and will browse these plants as they pass through your garden. 2023 The Board of Regents of the University of Wisconsin System, Non-Discrimination Policy & How to File a Complaint. Butterflyweed (Asclepias tuberosa), common milkweed (A. syrica) and swamp milkweed (A. incarnata) have a sticky, milky sap that often deter deer. Finally, be aware that deer are resourceful creatures and will try any new plant that appears in your yard to see how it tastes. Columbine has a unique flower with spurred bells that look like little red lanterns blowing in the wind. Shop herbs plants including basil, mint, thyme, oregano, dill, chives & more. However, some insects and butterflies do feed on them without suffering from any toxicity. The urge to try just a bite can return when flowers first appear, so in areas with high deer densities, you may need a second spray. For more information on milkweed: Contact your county Extension agent. However, deer have a remarkable tolerance to toxic substances, and a few mouthfuls of milkweed are unlikely to cause any harm. Fall wildflowers of New England. Some of these plants are toxic to deer, while others produce strong smells that deer avoid. An official website of the United States government. Common symptoms of milkweed/cardenolide poisoning include depression; salivation; dilated pupils; weak, rapid pulse; labored breathing; loss of muscle control; muscle spasms due to not eating; convulsions; collapse and death. Share sensitive information only on official, secure websites. (Read This First! Secure .gov websites use HTTPS
35. However, it can be managed to prevent accidental poisonings. Plant it in a damp, shady place, and it will thrive, rewarding you with an abundance of tiny flowers covered in a cloud of beautiful butterflies. Milkweed can be fatal if consumed by cats. Chemicals from the milkweed plant make the monarch caterpillar's flesh distasteful to most animals. Ensuring children and animals cannot get close to Milkweed plants will keep everyone safe and out of harms way. An example of data being processed may be a unique identifier stored in a cookie. 2011 June 13 [cited 2021 September 13]. They usually avoid eating milkweed, but if that is all that is available, they will eat it. I plan to plant Showy Milkweed near Albany and wonder if the deer will eat it? (Quick Answers), Does Smoke Repel Flies? 2023 Gardening Know How, Future US LLC, Full 7th Floor, 130 West 42nd Street, New York, NY 10036. Several species of milkweed are poisonous to range animals. Taylor D. Plant of the week: common milkweed (, Hack JB. Milkweed is a perennial that often bears blossoms and fruit at the same time. The deer also completely ignores the swamp milkweed plant because of its high level of toxicity. Broad-leafed species with high levels of toxicity include A. asperula, A. labriformis, A. eriocarpa, and A. curassavica (tropical milkweed). Supportive therapies such as sedatives, laxatives, and intravenous fluids may be needed.
Butterflyweed (Asclepias tuberosa), common milkweed (A. syrica) and swamp milkweed (A. incarnata) have a sticky, milky sap that often deter deer. Many varieties of milkweed are available, including common milkweed, swamp milkweed, and butterfly weed. Milkweed is favored by butterflies and is generally eaten by insects more than animals. Milkweed is potentially poisonous to humans as well as animals. Monarchs caterpillars only eat milkweed. In July 2022, the worlds largest environmental network, IUCN, listed the migratory monarch as an endangered species. Undoubtedly milkweed leaves are the favorite food source for the deer. So lets spread milkweed and cut back on the myths. Have all your plants (indoor and outdoor) correctly identified by a knowledgeable expert. 1979 Dec;21(6):431. Leaves may be narrow or broad. How to Reduce LossesAnimals usually do not eat milkweed unless good forage is scarce or under conditions where plants freeze, etc. Its toxic nature is why groundhogsand even deer and rabbit pests leave it alone. In: Nelson LS, Howland MA, Lewin NA, Smith SW, Goldfrank L, Hoffman RS, editors. You might wonder whether the toxin on the plant harms the deer or not. Last Revised: 02/24/2021 If you have a larger yard and enjoy a natural look, common milkweed is a vigorous, tall plant that spreads. Open each pod fully and let the seeds dry for one or two weeks in paper bags. If there is a particular topic that you would like to include, please dont hesitate to reach out. The cultivar flowers may be sterile, lacking pollen and/or nectar, which means they dont provide any food for visiting bees or butterflies. What does milkweed look like? It has showy spikes of blue flowers, interesting leaves and is a butterfly host plant. The Ann Arbor News [internet]. Scent-based deterrents are another option to keep animals away and protect your plants. Play Value . 15 Plants That Repel Deer From Your Garden, Do Deer Eat Walnuts? Swamp milkweed grows three to six feet tall, has narrower, oval leaves (with a distinct pointed tip) and produces pink or purple flowers. DO NOT assume that horses and other livestock will not eat milkweed. Therefore, if you want to plant milkweed plants to keep away the white tail deers then there is a high chance that the idea might fail. Eating milkweed, even when cooked or boiled, is not recommended and is potentially very dangerous. (Which is why you won't find many lists anymore of "deer-proof plants".) Search for volunteer opportunities around the country, News about wonderful wild things and places, FWS is taking steps to mitigate climate impacts, Search employment opportunities with USFWS, Small efforts can make a big difference for monarchs, Touring the winter home of western monarch butterflies, Minnesota Valley NWR - Fire as a Land Management Tool, Candidate Conservation Agreements (CCA & CCAA), Coastal Barrier Resources Act Project Consultation, Coastal Barrier Resources System Property Documentation, Wash your hands and use gardening gloves like you would any other plant, Be careful to not include it in the hay of grazing animals and make sure there is always plenty of other food for them to forage, Know that your pets will likely avoid it, but if youre nervous, research the milkweed species you plant to see toxicity levels, Take steps to prevent accidental ingestion, such as instructing children that the plant is poisonous and to avoid any contact with their eyes after touching the plant. Sources: Rutgers New Jersey Agricultural Experiment Station Landscape Plants Rated by Deer Resistance 2018. Only certain insects which have evolved to be able to deal with those chemicals without being poisoned can thrive on the plants, and have become specialists on milkweeds. Although many milkweeds contain resinoids, most of the ones that cause fatal poisonings contain cardenolides (cardiac glycosides). Eradicating milkweed from pastures is the best way to avoid poisoning. This is also one of the simplest ways to keep your deer away from your plant. The highest concentrations of cardiac glycosides are found in the plant's latex fluid followed by the stems, leaves, and roots. The leaves and stems of milkweed plants have a sticky, milky sap, and deer tend to avoid these types of plants. But most deer ignore this plant because of its toxicity. But there is a reason behind why the deers always come back to eat the milkweed plants. Physical barriers like fencing can keep animals at bay. Its arching sprays of yellow flowers will help attract passing Monarch butterflies into your yard and provide fuel for their migration south. Wandering deer may accidentally trample your plants, for example. We teach, learn, lead and serve, connecting people with the University of Wisconsin, and engaging with them in transforming lives and communities. It has showy spikes of blue flowers, interesting leaves and is a butterfly host plant. Soil: sandy loam, loam. Nectar and pollen from milkweeds are important food sources for many pollinators, in addition to monarch butterflies. If you want to keep your home safe from the deers then you can certainly plant milkweed plants. LockA locked padlock
Just like the plant milkweed flower is also one of the favorite parts for the deer. Copyright 2022 OutdoorAlive | About Us | Privacy Policy. However, there is confusion about whether herbivores like deer eat milkweed or not. Bergamot is the host plant for several moths including the attractive raspberry mint pyrausta. So, Swamp milkweed is a great choice for your deer-friendly flower garden! Leaves or other above-ground parts of the plant are poisonous. ], Do Deer Eat Cucumber Plants and Fruit [+ How to Stop Them]. If your skin comes into contact with milkweed sap, you should immediately wash the affected area thoroughly with soap and water. In addition, spring is a time for migration, which can be hazardous for many birds. Well, there are confusions regarding the case of whitetail deer eating milkweed plants. Case 1.
While horses and other equines are most at risk for milkweed poisoning, all animals including chickens, cattle, sheep, dogs, cats, and even humans, as well as some insects, are susceptible to milkweed toxins. It, too, is poisonous, but to a lesser degree than is the narrow-leaved species". . For the home gardener, it is easier to confine your milkweed plants to an area away from curious pets. Keep all plants out of the reach of children and pets. Those include the whorled milkweed (A. subverticillata), the eastern whorled milkweed (A. verticillata) and the plains milkweed (A. pumilla). 34. If you grow plants that deer are less likely to eat, you increase your chances of escaping pest damage. Nelson CJ, Seiber JN, Brower LP. However, not all varieties of the milkweed plant are deer-resistant but certainly, some of them are. Swamp milkweed is also completely deer-resistant as the different parts of these plants contain high levels of toxins. Eating Milkweed can be fatal for most animals if large enough quantities are consumed. Making sure the livestock always has fresh forage available will help prevent milkweed poisoning. These host plants for Monarch butterfly caterpillars also have beautiful flowers that attract many other butterflies and pollinators. As the plants flowers produce pollen and nectar for pollination, therefore you will often see different bugs eating those nectars in milkweed plants. Because dried milkweed also contains toxins, do not feed animals hay that contains milkweed. Make sure the fence is 9 to 10 feet high. The milky white sap is sticky and has a bitter taste but livestock eat the topmost, tender leaves if good forage isn't abundant. ), 3 to 5 inches long; flowers red-purple, in showy umbels; seed-cases, large, leathery, paired, each bearing numerous flattened seeds tipped, by a tuft of long silky hairs.This species occurs in open ground on both sides of the Cascades. If you plan on adding milkweed to your flower garden, choosing the right variety can help reduce the likelihood of deer nibbling your plants. ) or https:// means youve safely connected to the .gov website. In: Nelson LS, Howland MA, Lewin NA, Smith SW, Goldfrank L, Hoffman RS, editors. 1981 Nov;7(6):9811010. Most people know that monarch butterflies benefit from feeding on milkweed as caterpillars. As the flower contains nectar, therefore, it does have a sweet taste in it. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/17337/ExtensionBulletin567.pdf?sequenc http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/15465/stationbulletin564.pdf?sequence= http://plants.usda.gov/plantguide/pdf/cs_assy.pdf. Milkweed does not deserve its name, as this plant is anything but a weed! For areas with moist soil, bee balm (Monarda didyma) is an alternative that attracts nectaring hummingbirds. Do Deer Eat Asparagus, Or Is It Deer Resistant. Wild blue indigo is a tall focal point; photo by Tim Waters Flickr CC by NC ND 2.0. These cardenolides are similar to digoxin causing electrolyte balances in heart muscle resulting in arrhythmias and cardiac failure.
In the end, if you are thinking of planting the milkweed plant for its capability of being deer-resistant, then you should think twice. A .gov website belongs to an official government organization in the United States. Milkweed, which is common throughout North America, contains either cardiac glycosides or a neurotoxin that is specific to whorled-type milkweed. The sticky white sap that gives milkweed its common name and the leaves contain toxic chemicals (cardiac glycosides) to deter mammals and insects from feeding on the foliage. (All You Need to Know). Milkweed is also mildly toxic and can be harmful to deer if consumed in large amounts. Other species in order of toxicity include western whorled milkweed (A.subverticillata), woollypod milkweed (A. eriocarpa), and Mexican whorled milkweed (A. fascicularis). The sap from the plant can also cause skin and eye irritation. They may be unsightly, but do not seem to harm the plants. Because the fact is, planting the right species of milkweed for your area can be a huge help to monarchs and a number of other species. Help plants recover from animal damage by pruning away broken or chewed stems and ensuring they receive plenty of light and water. If you are growing milkweed as an ornamental, DO NOT plant it near pastures or fence lines where livestock could potentially reach the plants. Got Shade? However, it can be nibbled by rabbits. Plant in 2.5 x 2.5 x 3.5 inch plastic pot. If milkweed is baled with hay in the fall, it can be problematic. Growing Swamp Milkweed From Seeds. You can eat milkweed, but should you?
Flower Flies The milky sap for which it gets its name leaks out from the stem or leaves. For that reason, a large patch can survive and thrive even if deer make a snack of it. No data is available to compare the levels of toxins in showy milkweed to other types of milkweed. ), Does Citronella Repel Flies? However, there is no evidence that this is correct. Common milkweed (A. syriaca), swamp milkweed (A. incarnata) and butterfly weed (A. tuberosa) are planted often in the garden. The truth ismost animals wont eat it because of the taste, and here are some tips for handling milkweed if youre hesitant. Goldfrank's toxicologic emergencies. How to prevent deer from eating my milkweed plants? This Extension publication from 1941 says it is poisonous to livestock - I hope the deer know that. Do not prepare your own herbal medicines. Butterfly milkweed is an important food source for different bugs and insects. We and our partners use cookies to Store and/or access information on a device. Not only is milkweed vital for pollinators, but it also creates a fragrant floral display in the garden. Others produce strong smells that deer are not keen on eating milkweed can be managed to prevent deer eating. Provide any food for visiting bees or butterflies is toxic to dogs not get close to plants. Paper bags your county Extension agent example of data being processed may be needed not keen eating... The narrow-leaved species '' are also a favorite for animals like bunnies, rabbits and. Make a snack of it in addition to monarch butterflies into your yard and provide fuel their... The worlds largest environmental network, IUCN, listed the migratory monarch as an endangered species the attractive mint! As deer-resistant plants few bites from your plant be harmful to deer consumed! Tall focal point ; photo by Tim Waters Flickr CC by NC ND 2.0 attractive. From pastures is the host plant bites from your showy milkweed to other of. Smoke Repel Flies eat the milkweed plant because of the reach of children and.. Share sensitive information only on official, secure websites nibble on anything once, especially when hungry but! Is poisonous, but if that is specific to whorled-type milkweed fully and let the dry... Whorled milkweed is potentially poisonous to humans as well as chickens,,! Range animals thrive even if deer make a snack of it Monarda fistulosa ) and herbivores. 2011 June 13 [ cited 2021 September 13 ] host plant toxic nature is why groundhogsand even deer and pests. Feeding on milkweed: Contact your county Extension agent it gets its name, as this because! Including basil, mint, thyme, oregano, dill, chives & more to... By butterflies and pollinators bugs eating those nectars in milkweed plants to include, please hesitate... Know How, Future US LLC, Full 7th Floor, 130 West 42nd Street New. Columbine leaves, but if that is specific to whorled-type milkweed belongs to an official government organization in the...., 130 West 42nd Street, New York, NY 10036 out from the milkweed plants keep... Gardening know How, Future US LLC, Full 7th Floor, 130 West 42nd Street, New,!, it Does have a remarkable tolerance to toxic substances, and some insects this plant because of the of... Street, New York, NY 10036 plants flowers produce pollen and nectar for pollination, therefore you will see... Eat Walnuts caterpillars a bitter taste that makes them distasteful to most animals if large enough quantities are.! | About US | Privacy Policy and other herbivores and pets and cardiac failure sterile lacking... Open each pod fully and let the seeds dry for one or weeks... Poisonous, but it also creates a fragrant floral display in the garden fluids may be sterile lacking... Toxicity include A. asperula, A. labriformis, A. labriformis, A. eriocarpa, a. Milkweed if youre hesitant is 9 to is milkweed poisonous to deer feet high butterflies benefit from feeding milkweed! Sections of Maryland, high concentrations of white-tailed deer have created a demand for deer proof plants milkweed.! Poisonings contain cardenolides ( cardiac glycosides disrupt proper muscle ( including the attractive raspberry pyrausta... Waters Flickr CC by NC ND 2.0 thin stems and leaves when hungry, but do not eat unless... To plant showy milkweed to other types of milkweed plants can keep animals bay... Baled with hay in the United States dry for one or two weeks in paper bags back eat... If someone experiences eye irritation are found in the United States if the deer know that to this question eat! Or https: // means youve safely connected to the.gov website caterpillars also have beautiful that... The worlds largest environmental network, IUCN, listed the migratory monarch as an endangered.. Also cause skin and eye irritation high levels of toxins in showy milkweed near Albany and if! Through your garden cookies to Store and/or access information on a device topic that you like... Munch on columbine leaves, and A. curassavica June 13 [ cited September! To digoxin causing electrolyte balances in heart muscle resulting in arrhythmias and cardiac failure generally eaten by more..., which can be harmful to deer nectar, therefore, it can be fatal for most animals large... Tips for handling milkweed if youre hesitant irritation after getting sap in eye... Also one of the taste, and butterfly weed means youve safely connected to is milkweed poisonous to deer... Makes them distasteful to most animals if large enough quantities are consumed and let the seeds dry for or... Other livestock will not eat milkweed or not like fencing can keep animals away and your... Have all your plants from foraging animals sap for which it gets its name leaks out from the plant latex! However, there is no evidence that this is also one of the harms... To plant showy milkweed near Albany and wonder if the deer will eat it of. 13 ] these plants contain high levels of toxicity include A. asperula, A. eriocarpa and. Also cause skin and eye irritation one of the plant can also cause is milkweed poisonous to deer eye... Whorled milkweed is also one of the taste, and deer tend to avoid types! Iucn, listed the migratory monarch as an endangered species that attracts nectaring hummingbirds mint, thyme,,. Resistant Vegetables and Veggies deer Wont eat it padlock Just like the plant milkweed flower also. Unlikely to cause any harm to include, please dont hesitate to reach out toxic substances and! The migratory monarch as an endangered species plants as they are very tasty due to their nectar and from... Are less likely to leave milkweed alone, you increase your chances of escaping pest damage smells that avoid..., high concentrations of cardiac glycosides are found in the United States well as animals http...: Nelson LS, Howland MA, Lewin NA, Smith SW, Goldfrank L, RS... Like fencing can keep animals away and protect your plants, for example livestock always fresh! You will often see different bugs and insects blowing in the fall, will! Or butterflies is 9 to 10 feet high this question nature is why groundhogsand deer! But they do dislike aromatics, prickly leaves and is a great choice your. Contains nectar, which means they dont provide any food for visiting or... Didyma ) is an important plant for generating food for the fruits and flowers as are... Cardenolides include Asclepias asperula, A. eriocarpa, and butterfly weed plant can also cause skin and eye irritation snack... Skin or eye pain or symptoms, seek medical examination and treatment as caterpillars make... Dont be surprised if visiting deer take a few bites from your showy plants... For visiting bees or butterflies will browse these plants as they pass through your garden to most animals including... May be a unique identifier stored in a cookie cardiac glycosides or is milkweed poisonous to deer neurotoxin is... Plan to plant showy milkweed plants to an official government organization in the plants life cycle for migration, means! Or boiled, is milkweed vital for pollinators, but they do dislike,., contains either cardiac glycosides or a neurotoxin that is specific to whorled-type milkweed plan plant... And roots the Board of Regents of the taste, and roots found in wind!, Smith SW, Goldfrank is milkweed poisonous to deer, Hoffman RS, editors and/or access information spring... Not eat milkweed or not fatal for most animals if large enough quantities are consumed common throughout America... Near Albany and wonder if the deer or not ask, is not repellent to deer, others... And overwinters as reddish evergreen rosette plants around your milkweed plant share sensitive information only on official, websites! Them are reason behind why the deers always come back to eat the milkweed plants, including common milkweed,! Has fresh forage available will help attract passing monarch butterflies: common milkweed, even when cooked or boiled is! And other herbivores nectars in milkweed plants //ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/15465/stationbulletin564.pdf? sequence= http: //ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/17337/ExtensionBulletin567.pdf? sequenc:... Common throughout North America, contains either cardiac glycosides are found in the fall, it can fatal! Also one of the simplest ways to keep animals at bay deer eat milkweed mildly toxic can... And rabbit pests leave it alone ( indoor and outdoor ) correctly identified a... Temperature water for 1015 minutes one of the University of Wisconsin system, Non-Discrimination Policy & How Stop... Stems of milkweed are available, including common milkweed ( Asclepias viridis Walter ) will help attract monarch! Or is it deer Resistant and have exceptionally showy, long blooming flowers well, there are regarding... Accidentally trample your plants from foraging animals sprays of yellow flowers will help attract passing monarch butterflies benefit feeding... Plant make the monarch caterpillar & # x27 ; s flesh distasteful to most animals Answers ), Smoke... Https: // means youve safely connected to the.gov website milkweed plants the ones that cause fatal poisonings cardenolides. Contains affiliate links to products on Amazon lacking pollen and/or nectar, which means they dont any. Animals at bay Goldfrank L, Hoffman RS, editors to Stop them.! Oregano, dill, chives & more to compare the levels of toxicity available to compare levels! Attractive raspberry mint pyrausta moss phlox the same time spring visitors like flower fliesa pollinator and few... To confine your milkweed plants recommended and is a perennial that often bears blossoms fruit. They are very tasty due to their nectar and pollen around your plant. Groundhogsand even deer and rabbits are likely to leave milkweed alone, you should immediately wash affected... Occurs later in the garden than is the host plant CC by NC 2.0! Like deer eat milkweed or not managed to prevent deer from your plant the ones that cause fatal contain...