Butterflies love this plant, as it provides a great food source for them! Commonly called Mexican Butterfly Weed, Blood Flower or Tropical Milkweed, these showy plants have blooms in the colors of red, orange and yellow. Less drought tolerant than other milkweeds. Summer blooming. Full Sun. Perennial in the South, but please see note about tropical. Approx. seeds per packet = 185 (1/2 Gram Packet)
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This tropical milkweed is hardy in zones 9-11 and grown as an annual elsewhere. Prefers full sun but will grow in partial shade. Plants thrive in well-drained, medium moisture soils. Once established, will tolerate drought.
Seeds can be started indoors 8-10 weeks before the last frost date. Sow seeds 1/8" deep and 6-8" apart. Optimal soil temperature for germination is 65-80˚F. Seeds will sprout in 21-28 days. Thin seedlings so that mature plants are 24-36" apart. Transplant outdoors once the danger of frost has passed.
*A note about tropical milkweeds: There is some controversy in the conservation circles about whether or not it is a good practice to plant non-native milkweeds. We at Sow True Seed believe that anything that can be planted that acts as a food or habitat plant for pollinators is a good thing to do, but we support the idea that it’s a responsible practice to cut Asclepias curassavica back before seed pods reach maturity and disperse seeds.