Water lettuce (Pistia stratiotes)
Care, watering, light and tips for Water lettuce on Floravia.
Quick facts
- Family: Araceae
- Difficulty: Easy to care for
- Watering: every 7 days
- Light: Indirect light
- Temperature: 15–30 °C
- Toxicity: Toxic to pets
About Water lettuce
Pistia stratiotes, commonly known as water lettuce, is a floating aquatic plant from the Araceae family, characterized by its velvety, light green leaves that form a rosette similar to that of lettuce. It is ideal for ponds, freshwater aquariums, and slow-moving bodies of water, where it helps keep the water clean and provides shelter for aquatic fauna. Its rapid growth and attractive foliage make it an excellent choice for covering the water surface and adding an ornamental touch.
Native range
Africa, South America, and southeastern North America
Care tips
Water lettuce thrives in full to partial sunlight, though it prefers some shade in very hot climates to prevent leaf scorching. It does not require substrate as it floats freely, but it benefits from nutrient-rich water, preferably with a slightly acidic to neutral pH (6.0-7.5). Ensure there are no strong currents, as these can damage its fragile roots and leaves. A common mistake is allowing it to spread excessively, which can block light to other plants and deplete water nutrients, so regular population control is crucial.
How to save a dying Water lettuce
- Warning signs
- Yellowish/whitish leaves, brown edges, rot at the base.
- First aid
- Remove dead leaves. Ensure clean water, no excess nutrients.
- What kills it
- Excess nutrients (algae), lack of direct sunlight, or stagnant deoxygenated water.
- Can it be saved?
- Yes, if rot isn't advanced. Improve environment quickly.