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Azolla filiculoides (Mosquito Fern)

Pacific Mosquito Fern, American Water Fern, Mosquito Fern, Fairy Moss, Mosquito Fern, Pacific Azolla, Red Water Fern, Water Fern, Water Velvet

Azolla filiculoides, Pacific Mosquito Fern, American Water Fern, Mosquito Fern, Fairy Moss, Mosquito Fern, Pacific Azolla, Red Water Fern, Water Fern, Water Velvet, Aquatic Ferns, Pond Plants
Azolla filiculoides, Pacific Mosquito Fern, American Water Fern, Mosquito Fern, Fairy Moss, Mosquito Fern, Pacific Azolla, Red Water Fern, Water Fern, Water Velvet, Aquatic Ferns, Pond Plants

Azolla filiculoides (Mosquito Fern) is a tiny free-floating fern forming a mat of pinnately branched stems covered with minute, two-lobed leaves arranged in two rows. The upper leaf floats on the surface and the lower leaf is submerged. The bright green foliage turns purplish-rose in response to stress such as very bright light or very high or low temperatures. Small feather-like roots are produced along the lower surface of the stem and hang freely in the water. Nutrients are absorbed directly from the water by the roots. Native to both North and South America, Mosquito Fern occurs naturally in ponds and lakes, in slow-moving streams and rivers. It grows extremely quickly under optimum conditions and can sometimes become a nuisance. It can form thick mats that completely cover the surface of the water, preventing mosquitoes from depositing their eggs. It also discourages algae growth and helps keep waters clear. Mosquito Fern is cultivated as an ornamental plant for use in water gardens, aquaria, and ponds.

  • Grows up to 3 in. tall (7 cm) and spreads indefinitely.
  • Performs best in full sun to part shade in water gardens, ponds, or aquatic containers.
  • Virtually pest and disease free.
  • Reduce its spread by removing portions with a net.
  • Azolla filiculoides can grow quickly, easily out-competing indigenous vegetation. Decaying root and leaf matter below a mat of Azolla filiculoides, coupled with the lack of light penetration, can create an anaerobic environment which can reduce the quality of drinking water and make survival for other organisms in the water impossible.
  • Propagate by redistributing clusters of plantlets when they appear.
  • Native to the Rocky Mountain states of the western USA and Canada, through Central America, and to most of South America. It has been introduced to Europe, North and sub-Saharan Africa, China, Japan, New Zealand, Australia, the Caribbean, and Hawaii.

Requirements

Hardiness 7 - 11
Heat Zones 1 - 11
Plant Type Aquatic Plants, Ferns
Plant Family Salviniaceae
Exposure Full Sun, Partial Sun
Season of Interest Spring (Mid, Late)
Summer (Early, Mid, Late)
Fall
Height 2" - 3"
(5cm - 8cm)
Maintenance High
Water Needs High
Soil Drainage Poorly Drained
Characteristics Showy
Native Plants Alaska, Arizona, California, Florida, New York, Northeast, Oregon, Pacific Northwest, Southeast, Southwest, Texas, United States, Washington
Tolerance Wet Soil
Garden Uses Ponds And Streams, Water Gardens
How Many Plants
Do I Need?
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 7 - 11
Heat Zones 1 - 11
Plant Type Aquatic Plants, Ferns
Plant Family Salviniaceae
Exposure Full Sun, Partial Sun
Season of Interest Spring (Mid, Late)
Summer (Early, Mid, Late)
Fall
Height 2" - 3"
(5cm - 8cm)
Maintenance High
Water Needs High
Soil Drainage Poorly Drained
Characteristics Showy
Native Plants Alaska, Arizona, California, Florida, New York, Northeast, Oregon, Pacific Northwest, Southeast, Southwest, Texas, United States, Washington
Tolerance Wet Soil
Garden Uses Ponds And Streams, Water Gardens
How Many Plants
Do I Need?

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