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Water Caltrop

Trapa natans, Lythraceae

Zones
5a–11b
Layer
Aquatic
Lifespan
Annual
Growth
Moderate

Guild Roles

Producer

Growing Conditions

Sun

Partial Shade (optimal)Full Sun (optimal)

Water

ModerateHigh

Soil pH

6 – 7.5

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Water LettucePistia stratiotes
Nutrient AccumulationShade Provision
Water ChestnutEleocharis dulcis
Nutrient AccumulationBeneficial Insect Habitat

Antagonistic Plants

RiceOryza sativa

Water caltrop can compete with rice for light and space in aquatic systems

Water HyacinthEichhornia crassipes

Water hyacinth blocks light needed by water caltrop leaves and may release inhibitory compounds

Uses

Functions

Food

Edible Parts

Seeds

Common Questions

What zones does Water Caltrop grow in?

Water Caltrop grows in USDA hardiness zones 5a through 11b.

What are good companion plants for Water Caltrop?

Good companions for Water Caltrop include Water Lettuce, Water Chestnut.

Design guilds with Water Caltrop and see companion relationships visually.

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