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Grey Alder

Alnus incana, Betulaceae

Zones
2–6
Layer
Canopy
Lifespan
Perennial
Growth
Fast

Guild Roles

Nitrogen Fixer

Growing Conditions

Sun

Full Sun (optimal)

Water

Moderate

Soil pH

5 – 7.5

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

HopsHumulus lupulus
Nitrogen FixationPhysical Support
Granny Smith AppleMalus domestica Granny Smith
Nitrogen FixationWind Protection
Moorpark ApricotPrunus armeniaca Moorpark
Nitrogen FixationWind Protection
McIntosh AppleMalus domestica McIntosh
Nitrogen FixationWind ProtectionNurse Plant

Antagonistic Plants

CherimoyaAnnona cherimola

Grey alder's leaf litter and root exudates may inhibit cherimoya growth in shared growing areas

Uses

Functions

Timber

Common Questions

What zones does Grey Alder grow in?

Grey Alder grows in USDA hardiness zones 2 through 6.

Is Grey Alder a nitrogen fixer?

Yes, Grey Alder is a nitrogen fixer and can help provide nitrogen to neighboring plants in a guild or polyculture.

What are good companion plants for Grey Alder?

Good companions for Grey Alder include Hops, Granny Smith Apple, Moorpark Apricot, McIntosh Apple.

Design guilds with Grey Alder and see companion relationships visually.

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