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Giant Sea Holly

Eryngium giganteum, Apiaceae

Zones
4–8
Layer
Herbaceous
Lifespan
Biennial
Growth
Moderate

Guild Roles

Pollinator AttractorBeneficial Insect HabitatPest Confuser

Growing Conditions

Sun

Full Sun (preferred)

Water

Low (established)Moderate (seedling)

Soil pH

6 – 8

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Stiff hare's earBupleurum rigidum
Pollinator SharingBeneficial Insect Habitat

Antagonistic Plants

Bluestone EryngoEryngium integrifolium

Congeneric eryngo species compete for resources and may have allelopathic interactions

White SnakerootAgeratina altissima

Giant sea holly may compete with white snakeroot for light and space in temperate gardens

Uses

Functions

Specialized Bee MagnetHoverfly Breeding HabitatPredatory Beetle RefugeUmbellifer Wasp SupportLate Season Nectar

Edible Parts

Young LeavesRoots

Medicinal Uses

Digestive AidRespiratory Support

Common Questions

What zones does Giant Sea Holly grow in?

Giant Sea Holly grows in USDA hardiness zones 4 through 8.

What are good companion plants for Giant Sea Holly?

Good companions for Giant Sea Holly include Stiff hare's ear.

Design guilds with Giant Sea Holly and see companion relationships visually.

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