Photo: Andre HosperCC BY 4.0via iNaturalistresized / cropped
Water Foxtail Plant Care
Alopecurus geniculatus L.
Updated · Sources · How we source care data
This plant is easily recognized by its distinctive bent or "geniculate" stems, which give it a unique appearance in gardens. Alopecurus geniculatus originates from Europe and Asia, where it grows in wet meadows and marshes. Plant collectors are drawn to this species for its unusual stem structure and attractive, dense flower spikes.
Every 3–5 days
Full sun to partial shade
60–80°F
40–70%
At a glance
How do you care for Water Foxtail?
Water Water Foxtail every 3–5 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 60–80°F (16–27°C) and 40–70% humidity. Fertilize it every 8 months during the growing season.
Where Is the Water Foxtail Native To?
What Is the Water Foxtail?
Water Foxtail (Alopecurus geniculatus) belongs to the Poaceae family within the Alopecurus genus. Water Foxtail is native to much of Eurasia and introduced into North America, South America, and Australia. Water Foxtail is also known as Kneeling Foxtail.
Water Foxtail displays an upright, clumping grass growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Water Foxtail produces small, inconspicuous flowers in terminal panicles.
Leaf size: approximately 6 inches.
How Often Should You Water a Water Foxtail?
Alopecurus geniculatus requires watering every 3–5 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 3–5 days
Let soil partially dry between waterings
What Light Does the Water Foxtail Need?
Water Foxtail thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Water Foxtail Prefer?
Alopecurus geniculatus grows best at temperatures of 60–80°F. Water Foxtail prefers humidity levels of 40–70%.
Temperature
60–80°F
Humidity
40–70%
What Soil Mix Works Best for a Water Foxtail?
Moist, well-draining loamy soil with high organic content. Good drainage is essential for Water Foxtail to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Water Foxtail?
Feed Water Foxtail every 8 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 8 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Water Foxtail?
Divide and repot 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 Water Foxtail?
Water Foxtail can be propagated through seeds, division. Similar propagation techniques also apply to western foxtail plant care, which shares the same genus.
Is the Water Foxtail Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Water Foxtail, 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 Water Foxtail?
Water Foxtail 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.
What USDA Hardiness Zone Does the Water Foxtail Need?
Water Foxtail grows outdoors in USDA Zone 4a – 8b. It survives winters down to planting zone 4a. Water Foxtail is native to much of Eurasia and introduced into North America, South America, and Australia.
Hardiness Zone
Zone 4a – 8b
Keep exploring plants
Water Foxtail 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 Alopecurus genus — compare its care with other Alopecurus species on PlantoScan.
Alopecurus is part of the Poaceae plant family — browse all Poaceae genera and species.
Water Foxtail thrives in bright light and direct sun — see other bright-light plants.
More Alopecurus Species
Other Alopecurus species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Alopecurus geniculatus L., family Poaceae (first published in Sp. Pl. : 60 (1753)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Water Foxtail, 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: Andre Hosper, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 4a – 8b, estimated from the plant's typical growing conditions.
- 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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