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A picture of a Azolla

Azolla

Azolla spp.

Azolla caroliniana0 by [1] (CC-BY-SA-3.0)

Full Sun
Tender

10b

USDA zone

2°C

Minimum temperature

Expected size

Height
Spread

Max

Min

More images of Azolla

A photo of Azolla
A photo of Azolla

Azolla Overview

Genus of around 7 prolific, floating, aquatic fern species also known by the names duckweed fern, fairy moss, water fern and mosquito fern for their appearance and aquatic habit. They do not resemble traditional terrestrial ferns, they are reduced and adapted to aquatic habitats, appearing more like duckweed or a moss. Species are typically deciduous and perennial, grown for their decorative foliage and as algal control in ponds. However they can spread invasively, doubling in biomass every 3 days in optimal conditions, so must be controlled carefully.

Other uses of Azolla

Grown for the foliage and to control algae by reducing light beneath water.