Marsh Pea

Lathyrus palustris, Fabaceae

Zones

3–8

Layer

Ground Cover

Lifespan

Perennial

Growth

Fast

Guild Roles

Nitrogen FixerGround CoverMulch Maker

Growing Conditions

Sun

Full Sun (preferred)Partial Shade (tolerated)

Water

High (established)High (seedling)

Soil pH

6 – 8

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Companion Plants

Narbon VetchVicia narbonensis

Nitrogen FixationPollinator Sharing

Koronivia GrassBrachiaria humidicola

Nitrogen Fixation

Caucasian ComfreySymphytum caucasicum

Nitrogen FixationNutrient AccumulationBeneficial Insect Habitat

Chinese Milk VetchAstragalus sinicus

Nitrogen FixationNurse PlantWind Protection

Antagonistic Plants

Sickle SennaCassia tora

Both legumes compete for similar rhizobial partners and root zone nutrients

Uses

Functions

Nitrogen FixationSoil BuildingErosion ControlWetland Restoration

Edible Parts

SeedsYoung Pods

Common Questions

What zones does Marsh Pea grow in?

Marsh Pea grows in USDA hardiness zones 3 through 8.

Is Marsh Pea a nitrogen fixer?

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

What are good companion plants for Marsh Pea?

Good companions for Marsh Pea include Narbon Vetch, Koronivia Grass, Caucasian Comfrey, Chinese Milk Vetch.

Design guilds with Marsh Pea and see companion relationships visually.

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