Butterfly Milkweed (Asclepias tuberosa)

Butterfly Milkweed

Asclepias tuberosa

Asclepias tuberosa, commonly known as Butterfly Milkweed or Butterflyweed, is a bushy perennial that grows 1 to 2 feet tall. It is prized for its large, flat-topped clusters of bright-orange flowers that bloom from June to September. This species thrives in prairies and roadsides, preferring well-drained sandy or loamy soils. Butterfly Milkweed is highly attractive to butterflies and other pollinators, making it a popular choice for butterfly gardens and native plantings. Its vibrant flowers add a splash of color to any landscape.

Characteristics

Product Form	Plant, Seed
Type	Forb
Sun	Full Sun, Partial Sun
Soil	Loam, Sand/Gravel, Calcareous
Moisture	Dry, Mesic
Average Max Height (inches)	30
Suggested Plant Spacing (inches)	20
Bloom month(s)	June, July, August, September
Bloom Color or Type	Orange
Dominance	Low

Range Maps

Sowing Information

Sow seed onto a firm, weed-free seedbed. Hand-broadcast seed making two perpendicular passes for even coverage. If planting a mix, broadcast the grass component first and lightly rake/drag it into the top 1/8–1/4" of soil. Next, broadcast wildflower/forb seed and press it into the soil surface (with a roller/cultipacker or the back of a rake) to ensure good seed-to-soil contact. After seeding, apply a very light layer of clean, seed-free straw (or other weed-free, site-appropriate mulch) to reduce erosion and retain moisture without smothering seedlings. A good rainfall or thorough watering will help settle seed and mulch and improve germination.

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.