Grow milkweed (Asclepias) to support monarch butterflies ... The flowers are followed by narrow pods that release silky-haired seeds like other milkweeds. It grows best in full sun with moist ...

Seed from 21 common milkweed (Asclepias syriaca L. # ASCSY ... At a constant temperature of 30 C, germination was lower (32% average) and much more variable among seeds from different populations. At ...

Common milkweed Asclepias syriaca is a favorite of monarchs, hardy in zones three to eight, but very aggressive, spreading by deep rhizomes and seeds. The purple-pink flowers are fragrant at night ...