Photo: Игорь ВасильевCC BY 4.0via iNaturalistresized / cropped
Swamp Violet Plant Care
Viola uliginosa Besser
Updated · Sources · How we source care data
With heart-shaped leaves and delicate purple petals, this plant originates from wetlands in Europe and Asia. Plant collectors are drawn to its unique appearance and ability to thrive in moist environments, making it a valuable addition to water gardens and bog plantings.
Every 3–5 days
Partial shade to full sun
60–75°F
50–70%
At a glance
How do you care for Swamp Violet?
Water Swamp Violet every 3–5 days, letting the top layer of soil dry out between waterings, and give it partial shade to full sun. It prefers temperatures of 60–75°F (16–24°C) and 50–70% humidity. Fertilize it every 2 months during the growing season.
Where Is the Swamp Violet Native To?
- Albania
- Austria
- Belarus
- Belgium
- Bosnia and Herzegovina
- Bulgaria
- Croatia
- Cyprus
- Czechia
- Denmark
- Estonia
- Finland
- France
- Germany
- Greece
- Hungary
- Iceland
- Ireland
- Italy
- Latvia
- Lithuania
- Luxembourg
- Malta
- Moldova
- Montenegro
- North Macedonia
- Norway
- Poland
- Portugal
- Romania
- Russia
- Serbia
- Slovakia
- Slovenia
- Spain
- Sweden
- Switzerland
- The Netherlands
- Ukraine
- United Kingdom
What Is the Swamp Violet?
Swamp Violet (Viola uliginosa) belongs to the Violaceae family within the Viola genus. Swamp Violet is native to Europe.
Swamp Violet displays a low rosette, spreading growth habit, reaching up to tall with a spread of approximately 1 ft. Swamp Violet produces small, delicate flowers in various colors.
Leaf size: approximately 4 inches.
How Often Should You Water a Swamp Violet?
Viola uliginosa 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 Swamp Violet Need?
Swamp Violet thrives in partial shade to full sun.
Light Requirement
Partial shade to full sun
What Temperature and Humidity Does the Swamp Violet Prefer?
Viola uliginosa grows best at temperatures of 60–75°F. Swamp Violet prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
60–75°F
Humidity
50–70%
What Soil Mix Works Best for a Swamp Violet?
Well-draining, fertile soil with high organic matter content. Good drainage is essential for Swamp Violet to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Swamp Violet?
Feed Swamp Violet every 2 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 2 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 Swamp Violet?
Repot every 1-2 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 Swamp Violet?
Swamp Violet can be propagated through seeds, division of clumps. Similar propagation techniques also apply to hooked violet plant care, which shares the same genus.
Is the Swamp Violet Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Swamp Violet, 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 Swamp Violet?
Swamp Violet is susceptible to aphids, slugs, snails. 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 Swamp Violet Need?
Swamp Violet grows outdoors in USDA Zone 4a – 8b. It survives winters down to planting zone 4a. Swamp Violet is native to Europe.
Hardiness Zone
Zone 4a – 8b
Keep exploring plants
Swamp Violet 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 Viola genus — compare its care with other Viola species on PlantoScan.
Viola is part of the Violaceae plant family — browse all Violaceae genera and species.
Swamp Violet thrives in bright light and direct sun — see other bright-light plants.
More Viola Species
Other Viola species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Viola uliginosa Besser, family Violaceae (first published in Prim. Fl. Galiciae Austriac. 1: 169 (1809)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Swamp Violet, 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: Игорь Васильев, 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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