Butterfly Weed Care Plant butterfly weed in late spring after the soil warms. Will not count on it to bloom the first 12 months; flowering could choose 3 years. Blooms very last about two months, from late spring till late summertime. A. tuberosa Common Milkweed is relatively simple to increase, https://milkweed-plants-annual-or22100.blogrenanda.com/36961510/rumored-buzz-on-are-butterfly-milkweed-perennials