Water Starwort
Callitriche stagnalis
aquaticA submerged oxygenating plant with delicate, feathery foliage that forms dense mats in shallow water. It produces tiny greenish flowers at the water surface and is highly valued for improving water clarity and providing fish habitat. This fast-growing plant is essential in balanced aquatic ecosystems and wildlife ponds.
Common Problems
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Care Guide
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Light
Full sun to partial shade; prefers bright conditions with 4–6 hours of sunlight for dense growth.
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Water
Fully submerged in still or slow-moving water 6–18 inches deep; tolerates a wide range of water conditions.
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Soil
Minimal soil requirements; anchors in gravel, sand, or aquatic planting baskets with minimal substrate.
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Fertiliser
Benefits from trace minerals and micronutrients; low-to-moderate fertility required; excessive nutrients promote algae.
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Temperature
Cool-water oxygenator; prefers 50–68°F; tolerates seasonal temperature fluctuations.
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Humidity
Must remain fully submerged; extremely intolerant of desiccation.
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic; safe for all aquatic fauna.
Common Diseases
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.