Water Willow Plant Care
Dianthera americana L.
Updated · Sources · How we source care data
Dianthera americana, commonly known as the American water-willow, is an herbaceous, aquatic flowering plant in the family Acanthaceae. This perennial species is native to North America, and can typically be found in abundance throughout the eastern half of the continent along shorelines, in lakes or ponds, or in the shallow riffles of streams and rivers.
Bright indirect light
At a glance
How do you care for Water Willow?
Water Willow grows best in bright indirect light.
Where Is the Water Willow Native To?
What Is the Water Willow?
Water Willow (Dianthera americana) belongs to the Acanthaceae family within the Dianthera genus. Water Willow is native to North America, and can typically be found in abundance throughout the eastern half of the continent along shorelines, in lakes or ponds, or in the shallow riffles of streams and rivers. Water Willow is also known as American Water Willow.
Water Willow displays a compact, spreading perennial growth habit, reaching up to tall with a spread of approximately . Water Willow produces small tubular flowers in shades of pink, purple, or white.
What Light Does the Water Willow Need?
Water Willow thrives in bright indirect light. Avoid placing Water Willow in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect light
What Soil Mix Works Best for a Water Willow?
Well-draining loamy soil with added organic matter for moisture retention. Good drainage is essential for Water Willow to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Water Willow?
Repot every 1-2 years in 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 Willow?
Water Willow can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to dianthera angusta plant care, which shares the same genus.
Is the Water Willow Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Water Willow, 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 Willow?
Water Willow is susceptible to aphids, spider mites, whiteflies. 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
Water Willow 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 Dianthera genus — compare its care with other Dianthera species on PlantoScan.
Dianthera is part of the Acanthaceae plant family — browse all Acanthaceae genera and species.
Water Willow 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: Dianthera americana L., family Acanthaceae (first published in Sp. Pl. : 27 (1753)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Water Willow, 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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