Water Lettuce
Pistia stratiotes
aquaticWater Lettuce is a free-floating aquatic plant with soft, lettuce-like leaves arranged in rosette patterns. It provides excellent shade and shelter for aquatic life while naturally filtering water by absorbing excess nutrients. This tropical plant is invasive in some regions but highly valued in aquariums and ornamental water gardens.
Common Problems
Select the problem your Water Lettuce is experiencing to get a treatment guide.
Care Guide
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Light
Bright indirect light; 10–12 hours daily for optimal growth. Thrives in full sun but tolerates partial shade.
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Water
Maintain water temperature between 65–75°F (18–24°C). Ensure gentle water circulation to prevent stagnation; change water partially every 2–3 weeks.
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Soil
No soil required; floats freely. Roots absorb nutrients directly from water.
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Fertiliser
Apply liquid aquatic fertilizer weekly at half-strength. Use all-in-one or macronutrient formulas to prevent nutrient deficiency.
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Temperature
Prefers 65–75°F (18–24°C). Sensitive to cold; growth slows below 60°F (15°C).
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Humidity
Requires high humidity and moist air. Grow in enclosed aquariums or closed terrariums for best results.
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic to humans and pets. Safe for aquariums with herbivorous fish.
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.