Grow guide
How to grow Cup Plant
Silphium perfoliatum
- Type
- Perennial flower
- Zones
- USDA zones 4–8
- Sun
- Full
- Time to harvest
- 365–730 days
- Spacing
- 24″ apart
- Density
- 1 per sq ft
- Habit
- Upright
- Frost tolerance
- Very hardy
- Sowing
- direct/transplant
- Start indoors
- 0 weeks before last frost
Care
- Water As needed
- Deadhead As needed
Notes
Bold 6-10 ft prairie plant; paired leaves form water-holding cups; yellow daisies July-September; blooms year 2-3; birds drink from the cups.
More perennial flower varieties
Grows well nearby
Track Cup Plant from seed to harvest with Evengrow.
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