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Lake Quillwort

Isoetes lacustris, Isoetaceae

Zones
3–8
Layer
Herbaceous
Lifespan
Perennial
Growth
Slow

Guild Roles

Ground CoverBeneficial Insect Habitat

Growing Conditions

Sun

Partial Shade (preferred)Full Shade (tolerated)

Water

High (established)High (seedling)

Soil pH

5.5 – 7

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Large-leaf PondweedPotamogeton amplifolius
Nutrient AccumulationBeneficial Insect Habitat
Dwarf Water LilyNymphaea leibergii
Shade ProvisionNutrient Accumulation

Antagonistic Plants

Black-footed QuillwortIsoetes melanopoda

Congeneric quillworts with similar growth forms competing for benthic aquatic habitat

Water LobeliaLobelia dortmanna

Submerged rosette plants competing for oligotrophic lake bottom substrates

Uses

Functions

Water PurificationOxygenationSediment StabilizationHabitat Creation

Common Questions

What zones does Lake Quillwort grow in?

Lake Quillwort grows in USDA hardiness zones 3 through 8.

What are good companion plants for Lake Quillwort?

Good companions for Lake Quillwort include Large-leaf Pondweed, Dwarf Water Lily.

Design guilds with Lake Quillwort and see companion relationships visually.

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