True Yam

Dioscorea rotundata, Dioscoreaceae

Zones

9a–11b

Layer

Vine

Lifespan

Perennial

Growth

Moderate

Guild Roles

Producer

Growing Conditions

Sun

Full Sun (optimal)

Water

Low

Soil pH

5.5 – 7

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Companion Plants

Velvet BeanMucuna pruriens

Nitrogen FixationPest Deterrent

GreenbrierSmilax bona-nox

Physical SupportBeneficial Insect Habitat

Malabar SpinachBasella alba

Nutrient Accumulation

JiaogulanGynostemma pentaphyllum

Nutrient AccumulationBeneficial Insect Habitat

Winged BeanPsophocarpus tetragonolobus

Nitrogen FixationPhysical Support

Ivy GourdCoccinia grandis

Pollinator SharingPhysical Support

Antagonistic Plants

GroundnutApios americana

Both are climbing tuber crops that compete for root space and yam plants can produce growth-inhibiting compounds

Uses

Functions

Food

Edible Parts

Roots

Common Questions

What zones does True Yam grow in?

True Yam grows in USDA hardiness zones 9a through 11b.

What are good companion plants for True Yam?

Good companions for True Yam include Velvet Bean, Greenbrier, Malabar Spinach, Jiaogulan, Winged Bean.

Design guilds with True Yam and see companion relationships visually.

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