Azolla caroliniana is a small floating fern housing blue-green algae in its leaves and which grows to 1-cm in height and 1-+cm in width. This algae is capable of absorbing nitrogen from the air, which can then be used by the plant. Water resistant Azolla caroliniana now occurs all over the tropics where it has become a menace because it covers lakes and deprives the original aquatic plants of light. Used as a nitrogen fertiliser in rice paddies and some varieties are used as animal feed. Several related varieties are on the market with similar appearance. A decorative plant for open aquariums.

These beautiful plants are brought to your by Tropica - to find out more about them, click the icon on the left. You can also read some useful tips from the links below. CO2 Benefits Correct Fertilisation Correct Planting Cultivation Fish Resistant Lighting Your Plants