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She-Oak

Casuarina equisetifolia, Casuarinaceae

Zones
9–11
Layer
Canopy
Lifespan
Perennial
Growth
Fast

Guild Roles

WindbreakNitrogen Fixer

Growing Conditions

Sun

Full Sun (optimal)

Water

LowLowLow

Soil pH

5 – 8

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Lead PlantAmorpha canescens
Nitrogen FixationWind Protection
CherimoyaAnnona cherimola
Nitrogen FixationWind ProtectionNurse Plant
PeanutArachis hypogaea
Nitrogen FixationWind ProtectionShade Provision

Antagonistic Plants

Beaked HazelnutCorylus cornuta

She-oak is notoriously allelopathic, producing compounds that severely inhibit most other woody plants including hazelnuts

Italian AlderAlnus cordata

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

Uses

Functions

TimberNitrogen FixationWind Protection

Common Questions

What zones does She-Oak grow in?

She-Oak grows in USDA hardiness zones 9 through 11.

Is She-Oak a nitrogen fixer?

Yes, She-Oak is a nitrogen fixer and can help provide nitrogen to neighboring plants in a guild or polyculture.

What are good companion plants for She-Oak?

Good companions for She-Oak include Lead Plant, Cherimoya, Peanut.

Design guilds with She-Oak and see companion relationships visually.

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