SILPHIUM perfoliatum (Cup Plant)
Cup plant, or Silphium perfoliatum, is a small, sunflower-like Missouri native plant that grows in low woods and thickets, meadows, prairie stream/pond peripheries, and along railroad tracks throughout the state. In full sun, it grows easily in average, mild to wet soils. When grown from seed, it takes a long time to develop. In ideal growing conditions, it self-seeds.
| Number of Seeds | Max Coverage Area (Square Ft.) | |
|---|---|---|
| 0.5OZ | 1063 | 38 |
| 1OZ | 2,125 | 75 |
| 1/4LB | 8,500 | 300 |
| 1/2LB | 17,000 | 600 |
| 1LB | 34,000 | 1,200 |
| 5LB | 170,000 | 6,000 |
Scientific Name: Silphium Perfoliatum
Common Name: Cup Plant
Plant Type: Perennials
Family: Silphium
Zone: 3 to 9
Native Range: Eastern North America
Full Growth Height: 48-96 "
Width in Across: 12-36 "
Exposure: Full Sun
Blooming Season: Summer (Mid, Late), Fall
Flower Characteristics: Showy, Plant of Merit
Pollinators: Butterflies, Birds
Flower Color: Deep Yellow
Tolerate: Drought, Wet Soil, Clay
Water Requirement: Medium
Maintenance: Low
Soil Type: Chalk, Loam, Well-Drained, Moist
Soil pH: Neutral, Alkaline, Acid
Uses: Beds and Borders, Prairies and Meadows, Informal and Cottage