Tuberous Sweetpea

Lathyrus tuberosus, Fabaceae

Zones

4–8

Layer

Vine

Lifespan

Perennial

Growth

Fast

Guild Roles

Nitrogen FixerGround CoverPollinator Attractor

Growing Conditions

Sun

Full Sun (preferred)Partial Shade (tolerated)

Water

Moderate (established)Moderate (seedling)

Soil pH

6 – 7.5

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Companion Plants

Mediterranean CabbageBrassica fruticulosa

Nitrogen Fixation

Bristol Black RaspberryRubus 'Bristol'

Nitrogen FixationPhysical Support

Intermediate WheatgrassThinopyrum intermedium

Nitrogen FixationPhysical Support

Antagonistic Plants

Red PeaLathyrus cicera

Congeneric legumes with similar root architecture leading to direct competition

Caley PeaLathyrus hirsutus

Related Lathyrus species that may inhibit each other through root exudates

Uses

Functions

Nitrogen FixationClimbing SupportPollinator HabitatSoil ImprovementOrnamental

Edible Parts

Tubers

Common Questions

What zones does Tuberous Sweetpea grow in?

Tuberous Sweetpea grows in USDA hardiness zones 4 through 8.

Is Tuberous Sweetpea a nitrogen fixer?

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

What are good companion plants for Tuberous Sweetpea?

Good companions for Tuberous Sweetpea include Mediterranean Cabbage, Bristol Black Raspberry, Intermediate Wheatgrass.

Design guilds with Tuberous Sweetpea and see companion relationships visually.

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