Sullivant's Milkweed

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Asclepias Sullivantii 3 Asclepias Sullivantii 2 Asclepias Sullivantii Asclepias Sullivantii 1

Sullivant's Milkweed

Asclepias sullivantii

Asclepias sullivantii, known as Sullivant's Milkweed or Prairie Milkweed, is a perennial plant that typically grows 2 to 3 feet tall. It features broad, oval-shaped leaves and produces clusters of fragrant pink flowers from June to July. This species is commonly found in moist prairies and open fields, preferring rich, loamy soils. Sullivant's Milkweed serves as an important host plant for monarch butterflies, providing food for their caterpillars. In landscaping, it is valued for its attractive blooms and ecological benefits, particularly in butterfly gardens and prairie restorations.

Characteristics

Type Forb
Sun Full Sun, Partial Sun
Soil Loam, Sand/Gravel, Calcareous
Moisture Dry, Mesic
Average Max Height (inches) 50
Suggested Plant Spacing (inches) 20
Bloom month(s) June, July, August
Bloom Color or Type Violet
Dominance Low

Range Maps

Sowing Information

For most homeowners, the recommended method is to hand-broadcast seed at a minimum rate of 16–64 PLS (Pure Live Seed) ounces per acre. To ensure even coverage, broadcast the seed in perpendicular passes across the site. Grass seed should be broadcast first and lightly raked into the soil. Afterward, apply a light mulch layer using clean, seed-free straw or, preferably, our native Little Bluestem straw, available at our retail garden centers. Once mulching is complete, broadcast native wildflower seed over the area without raking it in. A good rainfall or thorough watering will provide sufficient soil contact for successful 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.