Silphium perfoliatum - Cup Plant
4–8' × 3–4' | Yellow blooms, midsummer to early fall | Tall, coarse-textured perennial | Full sun, moist to average soils | Supports pollinators, water source for birds
Cup Plant towers over summer gardens, its square stems holding opposite leaves that form little “cups” to catch rainwater. Bright yellow daisies attract pollinators, while birds sip from the leafy basins. Best for sunny, spacious spots with moisture.
Moist meadow mix: Joe-Pye Weed, Swamp Milkweed, Blue Vervain.
Bird-friendly: Sunflowers, Elderberry, Ironweed.
Specifications
| Pot Size | Quart, #1, #3, Plugs |
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