Genus guide
Asclepias — 14 species
Part of the Hoyas & relatives family (Apocynaceae)
Asclepias, the milkweeds, are North American prairie and meadow perennials beloved for their nectar-rich flower clusters that sustain monarch butterflies — Common Milkweed, Prairie Milkweed, and Spider Milkweed among the most familiar. They perform best in full sun and tolerate moderate to dry soil once established, needing little supplemental watering. All Asclepias species are toxic to cats and dogs: the milky sap contains cardiac glycosides (cardenolides) that can cause vomiting, weakness, rapid heart rate, and in severe cases seizures or death. Plant in pollinator beds away from pets.
All Asclepias species we cover
- Butterfly Weed
- Common Milkweed
- Green Comet Milkweed
- Green Milkweed
- Narrowleaf Milkweed
- Poke Milkweed
- Prairie Milkweed
- Purple Milkweed
- Showy Milkweed
- Spider Milkweed
- Sullivant's Milkweed
- Swamp Milkweed
- Tall Green Milkweed
- Whorled Milkweed
Asclepias — frequently asked questions
Are Asclepias plants toxic to cats and dogs?
Most Asclepias are not pet-safe. Of the 14 Asclepias species in the Growli library, 14 (100%) carry a toxic or mildly-toxic ASPCA classification and 0 are pet-safe. Always confirm the exact species on its pet-safety page before trusting it around cats or dogs.
How much light do Asclepias plants need?
Most Asclepias do best in direct sun. If yours stretches toward the window or loses its variegation it wants more light; scorched or bleached leaves mean it is getting too much direct sun.
Are Asclepias easy to care for?
Some Asclepias suit more experienced growers — several want strong light, sharp drainage or a specific seasonal rhythm. Check the individual species page for the exact regime.
How many Asclepias varieties are there?
Growli's care library covers 14 Asclepias species and varieties — browse them all above. They share a similar light, water and soil pattern, so once you learn one Asclepias, the rest follow closely.
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