Asclepias tuberosa, also known as butterfly weed or butterfly milkweed, is a perennial plant in the Apocynaceae or Dogbane family. A. tuberosa is native to the eastern and southwestern parts of the United States. A. tuberosa is an erect plant that has a hairy stem and long waxy leaves, growing up to 4 feet tall. It is known for its bright clusters of fragrant, orange & yellow flowers. Like many Milkweed species, the flowers are a great source of nectar for attracting butterflies, hummingbirds, bees, and other beneficial insects. USDA Hardiness Zones 3 to 9.
Asclepias tuberosa seeds should be placed in a moist medium such as sand, coco coir, or peat during a cold stratification period of 6 to 8 weeks at temperatures around 40ºF. After that period, move to temperatures around 70ºF for germination. Seeds should be sprinkled across the surface of your soil medium and lightly pressed in, but not covered. Use a well draining potting mix and keep moist, but not soaking wet. A. Tuberosa seeds will germinate in approximately 1 to 4 weeks after sowing. Even with optimal conditions, germination may be slow and sporadic. Established plants prefer light well draining soil mixes and full sun to partial shade.
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