Cup Plant, Silphium Seed
Cup Plant Silphium Seed
- Joined leaves collect rainwater around stems
- Towering flowers create dramatic habitat structure
- Yellow blooms attract diverse beneficial insects
- Best for spacious moist prairie gardens
Key Attributes
About Cup Plant, Silphium Seed
Cup plant is a towering prairie perennial whose joined leaves form small basins around the stems. Those natural cups collect rainwater that birds and insects may use, while yellow flowers provide a generous summer nectar source. Give it a spacious site with sun and dependable moisture where its colony-forming habit can shine.
Growing details
Plant profile
Seed & variety
Before Planting
Planting
Watering
Fertilizer
Harvesting
Tips
Pests & Diseases
Provide full sun and wide spacing to limit rust, powdery mildew, and leaf spotting on lower foliage.
Watch flower heads for seed-feeding insects and stems for borers. Remove badly damaged material after bloom.
Native States & Regions
- Alabama
- Arkansas
- Connecticut
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Nebraska
- New Jersey
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Pennsylvania
- South Dakota
- Tennessee
- Texas
- Vermont
- Virginia
- West Virginia
- Wisconsin
Native regions: Widespread Native
Cup Plant Silphium Native Range Map
Native range describes natural occurrence, not the origin of this seed lot or every location where a plant can be grown.
Alaska and Hawaii are shown as insets. State-level range does not mean a plant occurs throughout every part of that state.
Urban Farmer
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