Mosquito fern
Azolla pinnata
A small free-floating aquatic fern cultivated in rice paddies and ponds across Asia as a nitrogen-fixing green manure and livestock/fish feed.
Family
Salviniaceae
Temperature
20-35°C (absolute 15-40°C)
Soil pH
4-10 (absolute 3.5-10.5)
Soil types
still or slow-moving