Annuals, Perennials, Flowers
Milkweeds (so named for their milky sap) are the best-known representatives of this group of plants. Bloom in summer, typically bearing many small, starlike flowers in broad, flattened clusters at branch tips. All have inflated seedpods with silky seeds. Just a few species are cultivated in gardens.Asclepias currassavica
Zones 8, 9, 12–24; H1, H2; all zones as annual. Native to South America. Woody-based plant with stiff stems and narrow 6-in. leaves; grows 3 ft. tall, 2 ft. wide. Clusters of vivid red flowers.'Red Butterflies'
Flowers are bright orange-scarlet.
Hybrid of G. aristata and G. pulchella. Grows to 2–4 ft. high, 1 1/2 ft. wide,...
Native to tropical America, this annual grows 5 to 10 ft., climbs vigorously. Large, trumpet-shaped fl...
Original strains were single-flowered plants 3–4 ft. tall, 2 ft. wide. Modern strains are more v...