Brazilian Watermilfoil

Myriophyllum brasiliense, Haloragaceae

Zones

7–11

Layer

Herbaceous

Lifespan

Perennial

Growth

Fast

Guild Roles

Beneficial Insect HabitatPollinator Attractor

Growing Conditions

Sun

Full Sun (preferred)Partial Shade (tolerated)

Water

High (established)High (seedling)

Soil pH

6 – 8

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Antagonistic Plants

Slender NaiadNajas minor

Brazilian Watermilfoil forms dense mats that shade and potentially release allelopathic compounds affecting Slender Naiad

Leafy PondweedPotamogeton foliosus

Brazilian Watermilfoil competes directly with Leafy Pondweed for light and root space in submerged habitats

Whorled Water MilfoilMyriophyllum verticillatum

Closely related Myriophyllum species compete for the same ecological niche, with Brazilian watermilfoil often displacing native whorled watermilfoil

Wavy-leaved Water HawthornAponogeton undulatus

Dense watermilfoil growth blocks light penetration to benthic Aponogeton plants and may release inhibitory compounds

Gibbous DuckweedLemna gibba

Gibbous duckweed blocks light from reaching Brazilian watermilfoil, potentially releasing allelopathic compounds

Carolina FanwortCabomba caroliniana

Both are submerged aquatic plants that compete intensely for light and dissolved nutrients, with Myriophyllum often outcompeting native Cabomba through allelopathic compounds

Uses

Functions

Water FiltrationOxygenationNutrient CyclingHabitat Creation

Common Questions

What zones does Brazilian Watermilfoil grow in?

Brazilian Watermilfoil grows in USDA hardiness zones 7 through 11.

Design guilds with Brazilian Watermilfoil and see companion relationships visually.

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