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Grass Pea

Lathyrus sativus, Fabaceae

Zones
4–9
Layer
Herbaceous
Lifespan
Annual
Growth
Moderate

Guild Roles

Nitrogen FixerGround CoverMulch Maker

Growing Conditions

Sun

Full Sun (preferred)Partial Shade (tolerated)

Water

Low (established)Moderate (seedling)

Soil pH

6 – 8

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Taiwanese RaspberryRubus parvifolius var. taiensis
Nitrogen FixationPhysical Support
Perennial BuckwheatFagopyrum cymosum
Nitrogen FixationPollinator Sharing
False FlaxCamelina sativa
Nitrogen FixationTrap Crop

Antagonistic Plants

Asian MustardBrassica tournefortii

Brassica compounds can negatively affect legume growth and nitrogen fixation

Uses

Functions

Nitrogen FixationDrought ToleranceSoil BuildingErosion ControlWinter Cover

Edible Parts

SeedsYoung ShootsFlowers

Common Questions

What zones does Grass Pea grow in?

Grass Pea grows in USDA hardiness zones 4 through 9.

Is Grass Pea a nitrogen fixer?

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

What are good companion plants for Grass Pea?

Good companions for Grass Pea include Taiwanese Raspberry, Perennial Buckwheat, False Flax.

Design guilds with Grass Pea and see companion relationships visually.

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