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Eurasian Watermilfoil

Myriophyllum spicatum, Haloragaceae

Zones
3–10
Layer
Aquatic
Lifespan
Perennial
Growth
Fast

Guild Roles

Ground Cover

Growing Conditions

Sun

Full Sun (optimal)

Water

High

Soil pH

6 – 8

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

HornwortCeratophyllum demersum
Beneficial Insect HabitatNutrient Accumulation

Antagonistic Plants

Canadian WaterweedElodea canadensis

Both compete intensely for light and nutrients in aquatic systems, with Myriophyllum often outcompeting native Elodea

American EelgrassVallisneria americana

Invasive watermilfoil competes aggressively with native eelgrass in cold water systems

Uses

Functions

OxygenationWater Filtration

Common Questions

What zones does Eurasian Watermilfoil grow in?

Eurasian Watermilfoil grows in USDA hardiness zones 3 through 10.

What are good companion plants for Eurasian Watermilfoil?

Good companions for Eurasian Watermilfoil include Hornwort.

Design guilds with Eurasian Watermilfoil and see companion relationships visually.

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