Silphium perfoliatum (Cup Plant) [20 Seeds]

$3.95

Germination Information: I recommend these seeds for experienced seed-starters only, because they may require some patience. The easiest approach is to surface-sow (do not cover) the seeds in fall to late winter, setting them outdoors in a spot protected from mice so they can get a chilling period and then germinate when conditions are right in spring.

If you sow after February, set the pot in a plastic bag in your refrigerator for about 2 months before moving it to a warm, bright place for germination. (Remove the bag if the pot will be exposed to any direct sun.)

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Description

Cup plant (Silphium perfoliatum) bears large, broad leaves that cup 6- to 8-foot-tall stems topped with bright yellow, daisy-form flowers from midsummer to late summer or early fall. This U.S. native is popular with butterflies, bees, and other pollinators when in bloom, and birds feast on the seeds. The cupped leaf bases also hold rainfall, providing a natural source of water for wildlife. And, the long-stemmed blooms are terrific as cut flowers. Cup plant is a beautiful and valuable perennial if your garden is big enough for it! Be aware that it can self-sow once it reaches flowering size. Full sun. Perennial; Zones 3 to 9.

Collected in October 2020. At least 20 seeds.

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