Skip to main content

Carolina Mosquitofern

Azolla caroliniana

Last reviewed: June 2026

Carolina Mosquitofern (Azolla caroliniana)
Photo: David Perez / Wikimedia Commons (CC BY 3.0)

Light

part shade

Water

high

Size

0.5"–2" H × 2"–6" W

Bloom

N/A

Native to

AL, AR, CT, DE and 28 more states

Carolina mosquitofern is a tiny floating aquatic fern that forms dense mats on the surface of ponds, lakes, and slow-moving waterways. This diminutive native plant has delicate, overlapping fronds that create a carpet-like appearance on water surfaces. It requires consistent moisture or standing water to thrive and is not suitable for traditional landscape beds.

In an HOA neighborhood

Carolina Mosquitofern takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

  • Requires water features or constantly wet conditions
  • Can spread aggressively in aquatic settings
  • Not suitable for traditional landscaping applications

Wildlife value

This aquatic fern provides habitat for small fish, amphibians, and aquatic insects. It also helps control mosquito populations by creating surface coverage that limits breeding habitat.

Common questions

How much sun does Carolina Mosquitofern need?
Carolina Mosquitofern grows best in part shade conditions.
Where is Carolina Mosquitofern native?
Carolina Mosquitofern (Azolla caroliniana) is native to AL, AR, CT, DE and 28 more states, per the USDA PLANTS Database and regional native plant society lists.
Is Carolina Mosquitofern HOA-friendly?
Carolina Mosquitofern takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

Ready to grow Carolina Mosquitofern? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

Not sure where to start? Take the 2-minute yard quiz