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Light Preference
Full sun
Cup Plant (Silphium perfoliatum)
Cup Plant (Silphium perfoliatum)
Cup Plant (Silphium perfoliatum)
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SEEDS
Makes an unmistakable presence in large gardens & moist meadow plantings. A good wildlife plant.
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Item #:
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Availability:
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Binomial
Silphium perfoliatum
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Description
Cup plant makes an unmistakable presence in large rain gardens & moist meadow plantings. It is exceptional for wildlife, especially goldfinches and other birds that eat cup plant seeds. The leaves form "cups" on the stem; these cups will hold water from which birds will drink. In large stands of cup plant, birds will take refuge from the sun and heat by hiding in the foli
Uses: Birds, pollinators, rain gardens, bees, butterflies
Bloom time: July - September
Height: 6 to 8 feet
Space: 2 to 3 feet
Light: Full sun to light shade
Moisture: Average to moist
Seed: Harvest September/October. Six to eight weeks of cold-moist stratification will help germination--sow seed November - January.
1,800 seeds per ounce
1 ounce per 100 square feet
20 pounds per acre
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Light Preference
>
Full sun to light shade
Bloom Period
>
July - Aug
Bloom Period
>
Aug - Sept
Color
>
Yellow
Moisture
>
Average
Moisture
>
Moist
Characteristics
>
Good for Rain Gardens
Characteristics
>
Attracts Bees
Characteristics
>
Attracts Butterflies
Professional Opinion
>
1-star
Plant Size
>
Tall or large
Seed
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