Azolla caroliniana is an aquatic plant that must be kept constantly submerged or floating in water. It thrives in still or slow-moving fresh water.

Ensure the water level is maintained, as it will not survive if it dries out. It can be grown in ponds, water gardens, or even large containers filled with water.

Pruning is generally not required for Azolla caroliniana. Its growth is naturally controlled by available space and nutrients.

If it becomes too dense and starts to outcompete other aquatic plants or clog filters, it can be manually thinned out by scooping excess material from the water surface.

This also helps to prevent it from dying off and decaying.

Propagation is extremely easy as Azolla caroliniana reproduces rapidly by fragmentation. New plants develop from existing ones, and the population can double in a very short period under favorable conditions.

Simply place a small amount of the fern in suitable water, and it will quickly multiply. No special techniques are needed for propagation.

Azolla caroliniana is an aquatic plant and does not require repotting in the traditional sense. It floats on the water surface and spreads. If grown in a container, ensure the container remains filled with water.

If it becomes too dense, excess material can be removed and discarded or used to start new colonies elsewhere. It does not have roots that require soil.