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Hornwort

Ceratophyllum demersum, Ceratophyllaceae

Zones
4–10
Layer
Aquatic
Lifespan
Perennial
Growth
Fast

Guild Roles

Ground Cover

Growing Conditions

Sun

Partial Shade (optimal)

Water

High

Soil pH

6 – 7.5

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Eurasian WatermilfoilMyriophyllum spicatum
Beneficial Insect HabitatNutrient Accumulation
American EelgrassVallisneria americana
Beneficial Insect HabitatNutrient Accumulation
White Water LilyNymphaea alba
Shade ProvisionBeneficial Insect Habitat

Antagonistic Plants

Canadian WaterweedElodea canadensis

Hornwort releases allelopathic compounds and competes for light, often suppressing other submerged plants

Uses

Functions

Water FiltrationOxygenation

Common Questions

What zones does Hornwort grow in?

Hornwort grows in USDA hardiness zones 4 through 10.

What are good companion plants for Hornwort?

Good companions for Hornwort include Eurasian Watermilfoil, American Eelgrass, White Water Lily.

Design guilds with Hornwort and see companion relationships visually.

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