Mare's Tail
Hippuris vulgaris
aquaticMare's Tail is a submerged to emergent aquatic plant with distinctive whorled, needle-like leaves arranged in tight rings along unbranched stems. It thrives in shallow water margins and pond edges, growing rapidly to form dense stands. This plant is excellent for oxygenating water and stabilizing pond substrates.
Common Problems
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Care Guide
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Light
Full sun to partial shade; 6+ hours of direct sunlight optimal for vigorous growth
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Water
Fully submerged or semi-emergent; prefers water depth of 4–12 inches (10–30 cm); tolerates still or slowly moving water
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Soil
Rich substrate with organic matter or aquatic compost; benefits from nutrient-dense sediment
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Fertiliser
Low fertilizer needs; occasional all-purpose aquatic fertilizer in nutrient-poor water; relies on fish waste in established systems
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Temperature
Cold-hardy; thrives in cool to temperate water 45–72°F (7–22°C); dormant in winter
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Humidity
N/A—fully aquatic plant; requires consistent moisture and water contact
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic; safe for all household members and wildlife; historically used in herbal medicine
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.