Spiny Hornwort

Ceratophyllum echinatum, Ceratophyllaceae

Zones

5–10

Layer

Herbaceous

Lifespan

Perennial

Growth

Fast

Guild Roles

ProducerBeneficial Insect HabitatPest Confuser

Growing Conditions

Sun

Full Sun (preferred)Partial Shade (preferred)Full Shade (tolerated)

Water

High (established)High (seedling)

Soil pH

6 – 8.5

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Companion Plants

Asian FrogbitHydrocharis dubia

Nutrient Accumulation

Broad-leaved PondweedPotamogeton natans

Beneficial Insect HabitatShade Provision

Antagonistic Plants

Large-leaf PondweedPotamogeton amplifolius

Dense hornwort growth blocks light and releases allelopathic compounds affecting pondweed establishment

Giant DuckweedSpirodela intermedia

Submerged hornwort and surface duckweed compete for available light in water column

Madagascar Lace PlantAponogeton madagascariensis

Dense Spiny Hornwort growth may interfere with Madagascar Lace Plant's delicate root system

Giant VallisneriaVallisneria gigantea

Ceratophyllum species produce allelopathic compounds that can inhibit the growth of other submerged aquatic plants including Vallisneria species

Slender NaiadNajas minor

Ceratophyllum produces allelopathic compounds and competes with other submerged plants for dissolved nutrients

Amazon Sword PlantEchinodorus amazonicus

Hornwort allelopathic compounds can inhibit the growth of rooted aquatic plants like sword plants

Small PondweedPotamogeton pusillus

Hornwort allelopathic effects can inhibit small pondweed species in shared aquatic habitats

Swamp LilyOttelia ovalifolia

Hornwort allelopathic compounds can inhibit growth of other submerged flowering plants

Red Stem MilfoilMyriophyllum mattogrossense

Both produce allelopathic compounds and compete aggressively for light and nutrients in submerged habitats

Uses

Functions

Water FiltrationOxygenationAlgae ControlNutrient Absorption

Edible Parts

Young Shoots

Medicinal Uses

Water PurificationAntimicrobial

Common Questions

What zones does Spiny Hornwort grow in?

Spiny Hornwort grows in USDA hardiness zones 5 through 10.

What are good companion plants for Spiny Hornwort?

Good companions for Spiny Hornwort include Asian Frogbit, Broad-leaved Pondweed.

Design guilds with Spiny Hornwort and see companion relationships visually.

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