Hornwort
Ceratophyllum demersum
aquaticHornwort is a fully submerged, feathery-leaved aquatic plant that grows rapidly and excels at absorbing excess nutrients and producing oxygen. Its delicate, branching foliage provides excellent coverage and shelter for fish and aquatic invertebrates. This hardy plant is ideal for aquariums and outdoor ponds, though it can become invasive in some regions.
Common Problems
Select the problem your Hornwort is experiencing to get a treatment guide.
Care Guide
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Light
Requires bright indirect light; 10–12 hours daily. Adapts to moderate light but grows slower with less illumination.
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Water
Maintain water temperature between 50–80°F (10–27°C). Prefers cooler water but highly adaptable; no special water conditions needed.
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Soil
No soil required; fully submerged. Does not root; floats freely or anchors loosely.
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Fertiliser
Minimal fertilizer needed. In nutrient-rich water, may require no supplementation.
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Temperature
Hardy across wide temperature range; 50–80°F (10–27°C). Tolerates seasonal temperature variations.
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Humidity
Requires fully submerged conditions. Thrives in aquariums and outdoor ponds.
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic to humans and pets. Completely safe for aquariums with all fish types.
Common Pests
Seasonal Care
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Resume regular watering and feeding as growth picks up.
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Peak growing season. Water and feed regularly.
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Reduce watering as growth slows. Stop heavy feeding.
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Minimal watering and feeding. Protect from frost if needed.