The milkweed plant (Asclepias spp.) plays a critical role in the monarch life cycle. Each spring Monarchs move across the United States, laying eggs on native milkweeds, the only plants that serve as food for newly hatched monarch caterpillars.
Asclepias asperula (Spider Milkweed, Antelope Horns) is native to Arizona and regions in the Southwest, and grows well in large portions of the Midwest. See the USDA map for its distribution.
These seeds were produced in Yavapai County in Arizona. See our article -Growing Milkweed for the Monarch Butterfly- for complete details.
Want better germination, or can't wait to plant your Milkweed seed? Our friends at Painted Lady Vineyard and The Xerces Society have provided these detailed instructions to cold soak and stratify your milkweed seeds to get better and faster germination! Milkweed Seed Germination Procedures has all the details.
Perennial and hardy to Zone 7. Plants grow 1-3', producing large flower heads and large green seed pods that look like antelope horns.
Outdoor Sowing Recommended. Indoors: 8-10 weeks before last expected frost, chill seeds in a moist planting medium in a refrigerator for 4 weeks. Remove seeds, and sow in individual pots, just covering with soil. Plant out after last frost, 12" apart in garden soil. Outdoors: Sow seeds in late fall or early spring, just covering with soil, in full sun to light shade. Germination takes 3-4 weeks at 50-75 F.
Approx 100 seeds per packet