Watercress Plant Care

Watercress (Nasturtium officinale) belongs to the Brassicaceae family within the Nasturtium genus. Watercress is native to Europe, Asia, North America. Watercress is also known as Garden cress.

Watercress displays a trailing, spreading growth habit, reaching up to 1 inches tall with a spread of approximately 1 inches. Watercress produces bright, showy flowers in various colors.

Leaf size: approximately 0 inches.

Nasturtium officinale requires watering every 2–4 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Watercress thrives in full sun to partial shade light conditions. The optimal light range is 0–0 lux. Avoid placing Watercress in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Nasturtium officinale grows best at temperatures between 50°F and 75°F. Watercress prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining, fertile soil with a neutral pH. Good drainage is essential for Watercress to prevent waterlogging, which leads to root rot and fungal issues.

Does not transplant well, sow seeds directly. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Watercress can be propagated through seeds.

Watercress is susceptible to aphids, flea beetles, cabbage worms. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Watercress grows outdoors in USDA Zone 5a – 11b. Native to Europe, Asia, North America, Watercress is adapted to warm climates. In cooler regions, grow Watercress as a houseplant or bring it indoors before the first frost.