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Description
Asclepias, commonly known as milkweed, is a genus of perennial flowering plants that belong to the family Apocynaceae. The name Asclepias is derived from the Greek god Asclepius, who was associated with healing and medicine. There are over 100 species of Asclepias, which are native to various regions of North and South America.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Gentianales |
| Family | Apocynaceae |
| Genus | Asclepias |
Appearance
Asclepias plants have a unique appearance, with thick stems and large, broad leaves. The flowers are small and clustered together in umbels, and they range in color from pink to orange to white. The most distinctive feature of Asclepias plants is their fruit, which is a long, slender pod that splits open when ripe to reveal silky, white seeds that are carried by the wind.
Care Guide
Asclepias plants are relatively easy to care for, but they do have specific requirements:
- Water: Asclepias plants prefer well-drained soil that is kept evenly moist. Water them deeply once a week, or more often if the soil is dry.
- Fertilization: Asclepias plants do not require fertilization, but you can give them a boost with a balanced, slow-release fertilizer in the spring.
- Soil: Asclepias plants prefer well-drained soil that is rich in organic matter. They do not tolerate heavy clay soil.
- Sunlight: Asclepias plants require full sun to thrive. They will not flower well in shade.
- Hardiness Zones: Asclepias plants are hardy in USDA zones 3-9.
Common Pests & Diseases
Asclepias plants are relatively pest and disease resistant, but they can be affected by the following:
- Aphids: These small, soft-bodied insects can suck the sap from Asclepias plants and cause distortion and yellowing of the leaves. Treat with insecticidal soap or neem oil.
- Milkweed bugs: These insects feed on the seeds and can cause damage to the pods. They can be controlled by handpicking or with insecticidal soap.
- Fungal diseases: Asclepias plants can be affected by powdery mildew, leaf spot, and rust. These diseases can be prevented by providing good air circulation and avoiding overhead watering.
Habitat
Asclepias plants are native to various regions of North and South America, and they can be found in a variety of habitats, including prairies, meadows, and woodlands. They are an important host plant for the monarch butterfly, and they provide nectar for a variety of pollinators.
Question and Answer
Q: Can Asclepias plants grow in containers?
A: Yes, Asclepias plants can be grown in containers, but they will require a large pot and regular watering.
Q: How often should I fertilize my Asclepias plants?
A: Asclepias plants do not require fertilization, but you can give them a boost with a balanced, slow-release fertilizer in the spring.
Q: Do Asclepias plants attract bees?
A: Yes, Asclepias plants are an important source of nectar for bees and other pollinators.
Q: Can Asclepias plants be propagated from cuttings?
A: Yes, Asclepias plants can be propagated from stem cuttings taken in the summer.
Related Plants
- Asclepias tuberosa (Butterfly Weed)
- Asclepias curassavica (Tropical Milkweed)
- Asclepias syriaca (Common Milkweed)
- Asclepias speciosa (Showy Milkweed)
References
- “Asclepias.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=282207.
- “Growing Asclepias.” Monarch Watch, monarchwatch.org/bring-back-the-monarchs/milkweed/growing-milkweed.
- “Asclepias (Milkweed).” Garden Design, www.gardendesign.com/plants/asclepias.html.
