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 cup plant invasive in Michigan?

Habitat and distribution S. perfoliatum is listed as a threatened species in Michigan, but is listed as a prohibited and highly invasive plant species in New York State.

Where does Silphium grow?

This imposing long-lived perennial thrives in moist sites with sunny or partly sunny exposure. HABITAT & HARDINESS: Silphium perfoliatum occurs from Quebec to Maine and south to Georgia. Distribution extends west to Ontario and North Dakota and south to Oklahoma and Louisiana.

Where are cup plants found?

Cup plant is found throughout all the eastern and prairie states and several of the Canadian provinces. The rosinweed name makes reference to the thick, clear, viscous sap that exudes from the stem of most species when cut.

How do you grow Silphium perfoliatum?

Sowing: Direct sow in late fall, pressing into the surface of the soil. For spring planting, mix the seeds with moist sand and store in the refrigerator for 60 days before planting. Keep the soil consistently moist until germination. Growing: Water seedlings occasionally until they become established.

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.

Can cup plant be divided?

Silphium perfoliatum CareProvide moist, moderately rich, well-drained, neutral to alkaline soil for best results, but plants are fairly adaptable. PropagationSow ripe seeds. Divide in spring.

Can you eat cup plant?

The leaves of native, wild-growing cup plant can be blanched and used immediately in recipes or frozen for later use. Some of the earliest wild-growing greens, by mid-summer the leaves have a very strong flavor.

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.

Should I cut back cup plant?

The cup plant is both drought-tolerant and will thrive in wet areas. After it blooms and the petals drop, the cup plant’s seeds will also fall off, providing a treat for the birds. Right now, do nothing. This time of year, you don’t want to be pruning any shrubs or trees.

Is there a non invasive honeysuckle?

An equally showy alternative to this annoying plant is the non-invasive trumpet honeysuckle Lonicera sempervirens. This semi-evergreen twining climber—great for arbors and trellises – is native to the United States and hardy in zones 3-9.

Can you eat Silphium?

Silphium is in the daisy and dandelion family (Aseteraceae) making it also related to Sochan, and the flavor of the cooked greens will reveal its heritage when you eat it. Raw the leaves and young growing meristems have a strong flavor, but the taste is mellowed by blanching.