Watercress
Nasturtium officinale
vegetableWatercress is a nutrient-dense, peppery leafy green that thrives in wet environments and shallow water. It grows vigorously from stem cuttings or seeds and can be harvested repeatedly for months. This semi-aquatic vegetable is rich in vitamins and minerals and adds a distinctive peppery bite to salads and soups.
Common Problems
Select the problem your Watercress is experiencing to get a treatment guide.
Care Guide
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Light
Partial shade to full sun; prefers 4–6 hours of direct light. Too much intense sun can stress the plant; dappled light is ideal.
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Water
Requires consistently wet or waterlogged soil—essentially mimicking shallow stream conditions. Keep roots submerged or in perpetually moist soil. Standing water or hydroponic systems work well.
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Soil
Prefers sandy or silty, well-draining soil with high moisture retention. Can also grow in gravel or hydroponic media. Rich organic content is beneficial but not essential; watercress tolerates poor soils.
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Fertiliser
Light feeder. Minimal fertilization needed if grown in nutrient-rich water or amended soil. A weak liquid fertilizer every 4–6 weeks supports growth.
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Temperature
Prefers cool temperatures of 50–65°F (10–18°C). Tolerates cold well and can overwinter in mild climates. Heat and drought stress the plant.
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Humidity
Thrives in high humidity; naturally adapted to wet, humid stream environments. Misting is beneficial in dry indoor settings.
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Watercress is safe and nutritious for all family members and pets when properly cleaned.
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.