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Cup Plant

Silphium perfoliatum, Asteraceae

Zones
3a–9b
Layer
Herbaceous
Lifespan
Perennial
Growth
Fast

Guild Roles

Pollinator AttractorDynamic AccumulatorBeneficial Insect Habitat

Growing Conditions

Sun

Full Sun (optimal)

Water

ModerateModerate

Soil pH

5.5 – 7.5

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Sweet CherryPrunus avium
Beneficial Insect HabitatPollinator Sharing
SainfoinOnobrychis viciifolia
Nitrogen FixationPollinator Sharing
Wild RiceZizania palustris
Pollinator SharingBeneficial Insect HabitatWind Protection

Antagonistic Plants

Compass PlantSilphium laciniatum

Large Silphium species compete for space and resources, potentially allelopathic toward each other

Uses

Functions

Pollinator SupportWildlife HabitatWater Collection

Common Questions

What zones does Cup Plant grow in?

Cup Plant grows in USDA hardiness zones 3a through 9b.

What are good companion plants for Cup Plant?

Good companions for Cup Plant include Sweet Cherry, Sainfoin, Wild Rice.

Design guilds with Cup Plant and see companion relationships visually.

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