Water Lettuce Plant Care

Water Lettuce (Pistia stratiotes) belongs to the Araceae family within the Pistia genus. Water Lettuce is also known as Shellflower, Shell-flower, Kala.

Water Lettuce displays a floating rosette growth habit, reaching up to 0.5 inches tall with a spread of approximately 1 inches. Water Lettuce produces inconspicuous, tiny flowers hidden within the foliage.

Leaf size: approximately 4 inches.

Pistia stratiotes requires watering every 3–5 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Water Lettuce thrives in bright indirect light light conditions. The optimal light range is 250–500 lux. Avoid placing Water Lettuce in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Pistia stratiotes grows best at temperatures between 65°F and 85°F. Water Lettuce prefers humidity levels of 50–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Loamy soil with good organic content, well-draining. Good drainage is essential for Water Lettuce to prevent waterlogging, which leads to root rot and fungal issues.

Does not require potting, grows as a floating plant. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Water Lettuce can be propagated through division, offsets.

Water Lettuce is susceptible to aphids, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Water Lettuce grows outdoors in USDA Zone 13b. In cooler regions, grow Water Lettuce as a houseplant or bring it indoors before the first frost.