Greenish yellow flowers sometimes flushed with purple. Zones 4 to 9 at least. This tropical milkweed performs nicely as an annual, which it must be here in Zone 7. I usually start the seeds in early March which then provides blooms by July and then bloodflower blooms til frost. These are probably perennial in zones 8-11.
Flowers are greenish white with a touch of rose.
Clusters of white flowers in early summer. Attractive to butterflies. Not swampy lan at all. The progeny of that milkweed bloomed for a long time last summer with delicate pink blossoms that were covered with butterflies. Mauve pink showy flowers on tomentose plants.