PlantsFlowers
Cup Plant
Silphium perfoliatum
Chicago-region native. Suited to zone 6a.
Tall yellow flowers, leaves that hold water
EasyFlowersAlso Rain GardenRain garden
- Light
- Full sun–part shade
- Moisture
- Medium–moist
- Mature size
- 6–8 ft
- Spacing
- 3 ft
- Bloom or harvest
- Flowers Jul–Sep
- How it spreads
- Rhizomes, seeds
- What to buy
- One plant is a colony later.
- When to plant
- Plant May.
In the design
Birds drink from the leaf cups. It also seeds and runs. Put it where a thicket is the goal.
