Whorl Grass Plant Care
Catabrosa aquatica (L.) P.Beauv.
Updated · Sources · How we source care data
Catabrosa aquatica, called brookgrass, water whorl-grass, water whirlgrass and water hairgrass, is a widespread species of semi-aquatic grass in the genus Catabrosa, native to most of the non-tropical northern hemisphere, and to southern Chile and Argentina. As its scientific and common names suggest, it prefers to grow in wet areas, such as meadows, stream banks and lake shores.
Full sun to partial shade
At a glance
How do you care for Whorl Grass?
Whorl Grass grows best in full sun to partial shade.
What Is the Whorl Grass?
Whorl Grass (Catabrosa aquatica) belongs to the Poaceae family within the Catabrosa genus. Whorl Grass is native to most of the non-tropical northern hemisphere, and to southern Chile and Argentina. Whorl Grass is also known as Brook Grass, Water Whorl Grass.
Whorl Grass displays a grass-like clumping growth habit, reaching up to tall with a spread of approximately . Whorl Grass produces small inconspicuous flowers in spikelets.
What Light Does the Whorl Grass Need?
Whorl Grass thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Soil Mix Works Best for a Whorl Grass?
Moist, fertile soil with good drainage. Good drainage is essential for Whorl Grass to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Whorl Grass?
Divide clumps every 2-3 years in early spring. 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 Whorl Grass?
Whorl Grass can be propagated through division, seed.
Is the Whorl Grass Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Whorl Grass, 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 Whorl Grass?
Whorl Grass is susceptible to aphids, grasshoppers, cutworms. 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
Whorl Grass 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 Catabrosa genus — compare its care with other Catabrosa species on PlantoScan.
Catabrosa is part of the Poaceae plant family — browse all Poaceae genera and species.
Whorl Grass 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: Catabrosa aquatica (L.) P.Beauv., family Poaceae (first published in Ess. Agrostogr. : 97 (1812)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Whorl Grass, 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.
- 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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