Care Guide
Azolla, Mosquito fern
Azolla Caroliniana
Care at a Glance
Lighting
Adaptable
Growth Rate
Moderate
Growth Form
Varies
Placement
Versatile
True Aquatic
Yes
Available As
Bare root & XL portion
About This Plant
Azolla caroliniana, also known as mosquito fern, is a floating, aquatic fern native to the North, South, & Central America. It is a free-floating fern measuring less than ½ inch across. Newer leaves are gray green, but can turn rusty-red, especially in winter. It spreads vegetatively and can quickly form large, floating mats.This little fern is also useful as a floating plant in aquariums, where it can provide good cover for fry or for jumpy fish.
Quick-Reference Details
- Common name
- Azolla, Mosquito fern
- Scientific name
- Azolla Caroliniana
- Native to
- North, South, & Central America
- Difficulty
- Intermediate
- Requirements
- Floater
- Available as
- Bare root & XL portion
Difficulty — Intermediate
Forgiving enough for hobbyists with one tank of experience. Watch lighting and nutrient levels for best growth.
CO2 & Fertilization
CO2 is optional. Growth improves with supplementation, but the plant survives and stays presentable without it.
Tank Size & Setup
Works in tanks 10 gallons and up. Match the plant size to your tank depth for the cleanest aquascape.
Aquascaping & Placement
Position to suit your aquascape — most placements work as long as light reaches the leaves.
Tank-Mate Compatibility
Compatible with the full range of community-tank species — tetras, rasboras, livebearers, corydoras, and most other peaceful freshwater fish do not damage the foliage.
Common Care Issues
Slow initial growth
Most aquarium plants pause for 2-4 weeks after planting while they convert from their nursery-grown emersed form to fully submerged growth. New leaves that emerge underwater will look thinner and slightly different — this is the plant adapting, not a problem.
Frequently Asked Questions
How much light does Azolla, Mosquito fern need?
Azolla, Mosquito fern adapts to most planted-tank lighting setups. A standard LED fixture run 7-9 hours a day produces good growth.
Does Azolla, Mosquito fern need CO2?
CO2 is optional. Growth improves with supplementation, but the plant survives and stays presentable without it.
Is Azolla, Mosquito fern good for beginners?
Azolla, Mosquito fern is rated intermediate-level. Forgiving enough for hobbyists with one tank of experience. Watch lighting and nutrient levels for best growth.
How fast does Azolla, Mosquito fern grow?
Most planted-tank growers report moderate growth, with trims needed every few weeks under typical conditions.
What fish and invertebrates are compatible with Azolla, Mosquito fern?
Compatible with the full range of community-tank species — tetras, rasboras, livebearers, corydoras, and most other peaceful freshwater fish do not damage the foliage.
Available to Purchase
Azolla, Mosquito fern — $20.99
Free 2-day shipping on orders over $100