The Cup Plant (Silphium
perfoliatum) is a perennial plant that is native to the southeastern United
States and up into eastern Canada. It has a wide USDA Zone range of 3 to 9.
It blooms in mid- to late summer and is a pollinator
powerhouse. Dr. Paula Shrewsbury, an entomologist in the College of Agriculture
and Natural Resources at the University of Maryland has stated that Cup Plant
is the best native pollinator plant for the state of Maryland.
The small, sunflower-like flowers are held on tall,
sturdy stems. Along the stems are pairs of leaves that form the “cups” that
give this plant its common name. After a rain, you may see it retaining water
in them.
It needs full sun and is very low maintenance. It is an
ideal plant for rain gardens as it is not picky about soil types.
This is a plant that needs its space, so put it where it
can spread out a bit. Cup Plant also puts out deep roots making it hard to move
it, so pick its spot in your garden carefully. It can re-seed around a bit and
the young offshoots can be removed and planted or shared.
If you want to collect seeds, do so in September and
October and then store the seeds in the refrigerator for a cold, moist
stratification period of three months to simulate winter.
Cup Plant - You Can Grow That!
The video was produced
by Washington Gardener Magazine.
Visuals by Taylor
Calavetinos
Audio by Kathy Jentz
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