How do you grow Silphium perfoliatum from seed?
Place them outdoors in an area where they will experience the snow and cold of winter. The seed will germinate in the pots in spring as the weather warms up. Be sure to water the pots regularly in spring and once the plants are 5 cm (2 inches) tall, transplant them into your garden.
Is Silphium perfoliatum invasive?
Cup plant (Silphium perfoliatum) is an herbaceous perennial plant in the sunflower family that is native to the central plains of North America, though found to be invasive outside of its historic habitat.
Can you grow Silphium?
CULTURAL & MAINTENANCE NEEDS: Silphium perfoliatum is easy to grow in sunny sites moist sites. Plants thrive in average, moist or soggy sandy, loamy or clay soils. This species tolerates some drought after establishment. Plants are taller in wet sites but may lodge or topple if high winds occur when soils are soggy.
Do cup plants spread?
With the ability to grow to 8′ tall, Cup Plant has the power to over-crowd a smaller perennial garden. A central taproot will hold the large stalk steady while it spreads by shallow rhizomes to reproduce vegetatively. The name “cup plant” comes from the physical characteristic the plant has with its’ middle leaves.
Is Silphium a perennial?
Silphium integrifolium is a perennial plant in the sunflower family native to the Great Plains and other parts of North America.
How do you get seeds from cup plants?
Seed Saving: After the flower petals fall from the head, the center cone will begin to develop seed. Remove the seed heads as soon as the stem beneath the cone begins to turn dry and brown. Spread the seed heads out to dry away from direct sunlight, then separate the small seeds from the stems by rubbing them lightly.
Is cup plant perennial?
Ranging between four and eight feet tall, the cup plant (Silphium perfoliatum) is a sunflower-like perennial with coarse leaves that’s commonly found in low woods, prairies, and meadows, and bordering streams or ponds.
What are cup plants good for?
Known for their yellow blooms, coarse leaves, and super long stems, cup plants attract butterflies, birds, bees, and other beneficial insects throughout the growing season, or July through September. Pollinators are attracted to their large, bright blooms, while birds enjoy to eat the plants’ nutritious seeds.
Are cup plants weeds?
Silphium perfoliatum, the cup plant or cup-plant, is a species of flowering plant in the family Asteraceae, native to eastern and central North America….
| Silphium perfoliatum | |
|---|---|
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Silphium |
| Species: | S. perfoliatum |