Carolina Azolla (Azolla caroliniana)

Photo: Annika LindqvistCC BY 4.0via iNaturalistresized / cropped

Carolina Azolla Plant Care

Azolla caroliniana Willd.

Updated · Sources · How we source care data

Azolla cristata, the Carolina mosquito fern, Carolina azolla, or water velvet, is a species of the Azolla genus native to the Americas, in eastern North America from southern Ontario southward, from the east coast west to Wisconsin and Texas, the Caribbean, and in Central and South America from southeastern Mexico (Chiapas) south to northern Argentina and Uruguay.

🌿Ferns💧Aquatic Plants
Light

Full sun to partial shade

At a glance

How do you care for Carolina Azolla?

Carolina Azolla grows best in full sun to partial shade.

Where Is the Carolina Azolla Native To?

Native range45 countries

What Is the Carolina Azolla?

Carolina Azolla (Azolla caroliniana) belongs to the Salviniaceae family within the Azolla genus. Carolina Azolla is native to the Americas, in eastern North America from southern Ontario southward, from the east coast west to Wisconsin and Texas, the Caribbean, and in Central and South America from southeastern Mexico (Chiapas) south to northern Argentina and Uruguay. Carolina Azolla is also known as Water Fern, Mosquito Fern, Floating Moss.

Carolina Azolla displays a floating aquatic fern growth habit, reaching up to tall with a spread of approximately . Carolina Azolla produces tiny inconspicuous sporocarps.

What Light Does the Carolina Azolla Need?

Carolina Azolla thrives in full sun to partial shade.

Light Requirement

Full sun to partial shade

What Soil Mix Works Best for a Carolina Azolla?

Nutrient-rich, muddy soil or water with high organic content. Good drainage is essential for Carolina Azolla to prevent waterlogging, which leads to root rot and fungal issues.

How Do You Repot a Carolina Azolla?

Not applicable, grows floating on water. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

How Do You Propagate a Carolina Azolla?

Carolina Azolla can be propagated through spores, division. Similar propagation techniques also apply to red water fern plant care, which shares the same genus.

Is the Carolina Azolla Toxic to Pets and Children?

Pet safety not verified

The ASPCA does not list Carolina Azolla, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.

This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.

See all plants toxic to cats and plants toxic to dogs.

What Pests and Diseases Affect the Carolina Azolla?

Carolina Azolla is susceptible to generally pest-free. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Keep exploring plants

Carolina Azolla is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.

It belongs to the Azolla genus — compare its care with other Azolla species on PlantoScan.

Azolla is part of the Salviniaceae plant family — browse all Salviniaceae genera and species.

Carolina Azolla thrives in bright light and direct sun — see other bright-light plants.

Related Plant Care Guides

Closely related plants with similar care requirements:

Sources

  • Scientific name & taxonomy: Azolla caroliniana Willd., family Salviniaceae (first published in Sp. Pl., ed. 4 , 5: 541 (1810)) — World Flora Online record, IPNI name record.
  • Pet toxicity: Pet safety not verified: the ASPCA does not list Carolina Azolla, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
  • Photo: Annika Lindqvist, CC BY 4.0, iNaturalist — original.
  • Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.

Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.

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