Duckweed (Lemna obscura)
Care, watering, light and tips for Duckweed 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 Duckweed
Lemna obscura, commonly known as little duckweed, is a tiny floating aquatic plant belonging to the Araceae family. It is characterized by its small, bright green, oval fronds that cover the water surface. It is ideal for ponds, aquariums, or any stagnant body of water, where it forms a green carpet that beautifies the landscape and provides shelter for small organisms.
Native range
North America
Care tips
This species thrives in indirect to full sunlight and temperate temperatures. It does not require substrate, as it floats freely on the water. The most common mistake is allowing it to completely cover the surface, which can reduce oxygen for other aquatic species; it is important to remove excess periodically to maintain balance.
How to save a dying Duckweed
- Warning signs
- Discoloration (yellow/brown), frond disintegration, rapid population decrease.
- First aid
- Remove dead fronds. Check water quality (pH 6.5-7.5, no chlorine). Ensure soft indirect light and adequate nutrients.
- What kills it
- Contaminated or chemical-laden water, extreme temperatures, lack of essential nutrients, or excessive direct light.
- Can it be saved?
- Yes, if you act quickly. It's very resilient and recovers well with correct conditions.