Italian Alder

Alnus cordata, Betulaceae

Zones

5–7

Layer

Canopy

Lifespan

Perennial

Growth

Fast

Guild Roles

Shade ProviderNitrogen Fixer

Growing Conditions

Sun

Full Sun (optimal)Partial Sun (tolerated)

Water

ModerateModerate

Soil pH

5 – 7.5

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Companion Plants

Braeburn AppleMalus domestica Braeburn

Nitrogen FixationWind Protection

Elberta PeachPrunus persica Elberta

Nitrogen FixationWind Protection

Asian PearPyrus pyrifolia

Nitrogen FixationBeneficial Insect Habitat

Honeycrisp AppleMalus domestica Honeycrisp

Nitrogen FixationWind Protection

CarrotDaucus carota var. sativus

Nitrogen FixationBeneficial Insect Habitat

Italian Prune PlumPrunus domestica Italian

Nitrogen FixationWind Protection

Antagonistic Plants

She-OakCasuarina equisetifolia

She-oak is highly allelopathic and competitive, inhibiting other nitrogen-fixing trees including alders

Uses

Functions

TimberNitrogen FixationSoil Building

Common Questions

What zones does Italian Alder grow in?

Italian Alder grows in USDA hardiness zones 5 through 7.

Is Italian Alder a nitrogen fixer?

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

What are good companion plants for Italian Alder?

Good companions for Italian Alder include Braeburn Apple, Elberta Peach, Asian Pear, Honeycrisp Apple, Carrot.

Design guilds with Italian Alder and see companion relationships visually.

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