Common Milkweed Plant Care
Asclepias syriaca L.
Asclepias syriaca, commonly called common milkweed, butterfly flower, silkweed, silky swallow-wort, and Virginia silkweed, is a species of flowering plant. It is native to southern Canada and much of the United States east of the Rocky Mountains, excluding the drier parts of the prairies.
Every 7â10 days
Full sun
60â85°F
40â60%
What Is the Common Milkweed?
Common Milkweed (Asclepias syriaca) belongs to the Apocynaceae family within the Asclepias genus. Common Milkweed is native to southern Canada and much of the United States east of the Rocky Mountains, excluding the drier parts of the prairies. Common Milkweed is also known as Milkweed, Butterfly Weed, Silkweed.
Common Milkweed displays an upright, clumping perennial growth habit, reaching up to 3 inches tall with a spread of approximately 2 inches. Common Milkweed produces clusters of small, colorful flowers in shades of pink, orange, or yellow.
Leaf size: approximately 6 inches.
How Often Should You Water a Common Milkweed?
Asclepias syriaca requires watering every 7â10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7â10 days
Let soil partially dry between waterings
What Light Does the Common Milkweed Need?
Common Milkweed thrives in full sun light conditions. The optimal light range is 2000â3000 lux. Avoid placing Common Milkweed in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Full sun
2000â3000 lux
What Temperature and Humidity Does the Common Milkweed Prefer?
Asclepias syriaca grows best at temperatures between 60°F and 85°F. Common Milkweed prefers humidity levels of 40â60%.
Temperature
60â85°F
Humidity
40â60%
What Soil Mix Works Best for a Common Milkweed?
Well-draining sandy loam with some organic matter. Good drainage is essential for Common Milkweed to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Common Milkweed?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Common Milkweed?
Common Milkweed can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to butterfly weed plant care, which shares the same genus.
Fertilizing
Every 6 months
During the growing season
Is the Common Milkweed Toxic to Pets and Children?
Toxic to Pets & Children
Toxic to humans and pets if ingested
What Pests and Diseases Affect the Common Milkweed?
Common Milkweed is susceptible to aphids, milkweed bugs, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
What USDA Hardiness Zone Does the Common Milkweed Need?
Common Milkweed grows outdoors in USDA Zone 13a. Native to southern Canada and much of the United States east of the Rocky Mountains, excluding the drier parts of the prairies, Common Milkweed is adapted to warm climates. In cooler regions, grow Common Milkweed as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Common Milkweed is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Asclepias genus â compare its care with other Asclepias species on PlantoScan.
Common Milkweed thrives in bright light and direct sun â see other bright-light plants.
More Asclepias Species
Other Asclepias species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
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