Large Marsh Rose-gentian Plant Care
Sabatia dodecandra (L.) Britton, Sterns & Poggenb.
Updated · Sources · How we source care data
Sabatia dodecandra, common names large marsh pink or marsh rose gentian, is a plant in the Gentianaceae family.
Every 4–7 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Large Marsh Rose-gentian?
Water Large Marsh Rose-gentian every 4–7 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–80°F (10–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
What Is the Large Marsh Rose-gentian?
Large Marsh Rose-gentian (Sabatia dodecandra) belongs to the Gentianaceae family within the Sabatia genus. Large Marsh Rose-gentian is also known as Marsh Rose-gentian, Rose-gentian.
Large Marsh Rose-gentian displays an upright, branching perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Large Marsh Rose-gentian produces showy, star-shaped flowers in pink, purple, or white.
Leaf size: approximately 4 inches.
How Often Should You Water a Large Marsh Rose-gentian?
Sabatia dodecandra requires watering every 4–7 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 4–7 days
Let soil partially dry between waterings
What Light Does the Large Marsh Rose-gentian Need?
Large Marsh Rose-gentian thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Large Marsh Rose-gentian Prefer?
Sabatia dodecandra grows best at temperatures of 50–80°F. Large Marsh Rose-gentian prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Large Marsh Rose-gentian?
Moist, well-draining soil rich in organic matter. Good drainage is essential for Large Marsh Rose-gentian to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Large Marsh Rose-gentian?
Feed Large Marsh Rose-gentian every 6 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 6 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 Large Marsh Rose-gentian?
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 Large Marsh Rose-gentian?
Large Marsh Rose-gentian can be propagated through seeds, division of clumps. Similar propagation techniques also apply to shortleaf sabatia plant care, which shares the same genus.
Is the Large Marsh Rose-gentian Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Large Marsh Rose-gentian, 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 Large Marsh Rose-gentian?
Large Marsh Rose-gentian 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.
What USDA Hardiness Zone Does the Large Marsh Rose-gentian Need?
Large Marsh Rose-gentian grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Large Marsh Rose-gentian as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Large Marsh Rose-gentian 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 Sabatia genus — compare its care with other Sabatia species on PlantoScan.
Sabatia is part of the Gentianaceae plant family — browse all Gentianaceae genera and species.
Large Marsh Rose-gentian thrives in bright light and direct sun — see other bright-light plants.
More Sabatia Species
Other Sabatia species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Sabatia dodecandra (L.) Britton, Sterns & Poggenb., family Gentianaceae (first published in Prelim. Cat. : 36 (1888)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Large Marsh Rose-gentian, 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.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- 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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