Silphium perfoliatum var. connatum

Silphium perfoliatum var. connatum var. connatum

var. connatum

Silphium

Asteraceae

Flowering Plants

Zone 5–9

🐾 Pet-Safe

🌱 Beginner Friendly

Cup plant is a robust native perennial that thrives in moist, average soils with partial to full sun exposure. Its distinctive cup-shaped leaf bases collect rainwater, providing a drinking source for birds and insects. Once established, it requires minimal care and spreads naturally to form impressive colonies.

Care Requirements

Care Level

Low

Sun

Partial Shade

Water

Moderate

Growth Rate

Fast

Mature Height

18″ – 36″

Soil

loam

Life Cycle

Perennial

Spacing

36″

Watering Schedule

Every 7-10 Days • Water Deeply Until Soil Is Moist; Allow Top Inch To Dry Between Waterings

Soil pH

4.5 – 7.5

Temperature

-10° – 85°F

Mature Spread

up to 24″

Root Depth

Medium

Foliage

Coarse

Ecology & Origin

Native to

North Carolina

Virginia

West Virginia

Attracts

🐝 Bees

🐝 Butterflies

🐝 Birds

Sources

Data: trefle

Hardiness Zones

Check your zone:

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