Rhinanthus osiliensis Plant Care
Rhinanthus osiliensis (Ronniger & Saarsoo) Vassilcz.
Updated · Sources · How we source care data
Rhinanthus osiliensis, in English known by the common name Saaremaa yellow rattle, is a flowering plant in the genus Rhinanthus in the family Orobanchaceae. It is endemic to the Estonian island Saaremaa in the Baltic Sea.
Every 7–10 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Rhinanthus osiliensis?
Water Rhinanthus osiliensis every 7–10 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 Rhinanthus osiliensis?
Rhinanthus osiliensis (Rhinanthus osiliensis) belongs to the Orobanchaceae family within the Rhinanthus genus. Rhinanthus osiliensis is native to the Estonian island Saaremaa in the Baltic Sea.
Rhinanthus osiliensis displays an upright, branching perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Rhinanthus osiliensis produces tubular yellow flowers in dense spikes.
Leaf size: approximately 2 inches.
How Often Should You Water a Rhinanthus osiliensis?
Rhinanthus osiliensis requires watering every 7–10 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 7–10 days
Let soil partially dry between waterings
What Light Does the Rhinanthus osiliensis Need?
Rhinanthus osiliensis thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Rhinanthus osiliensis Prefer?
Rhinanthus osiliensis grows best at temperatures of 50–80°F. Rhinanthus osiliensis prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Rhinanthus osiliensis?
Well-draining loamy soil with added organic matter. Good drainage is essential for Rhinanthus osiliensis to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Rhinanthus osiliensis?
Feed Rhinanthus osiliensis 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 Rhinanthus osiliensis?
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 Rhinanthus osiliensis?
Rhinanthus osiliensis can be propagated through seeds. Similar propagation techniques also apply to yellow rattle plant care, which shares the same genus.
Is the Rhinanthus osiliensis Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Rhinanthus osiliensis, 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 Rhinanthus osiliensis?
Rhinanthus osiliensis is susceptible to aphids, leafhoppers, spider mites. 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 Rhinanthus osiliensis Need?
Rhinanthus osiliensis grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Rhinanthus osiliensis is native to the Estonian island Saaremaa in the Baltic Sea. In cooler regions, grow Rhinanthus osiliensis as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Rhinanthus osiliensis 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 Rhinanthus genus — compare its care with other Rhinanthus species on PlantoScan.
Rhinanthus is part of the Orobanchaceae plant family — browse all Orobanchaceae genera and species.
Rhinanthus osiliensis 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: Rhinanthus osiliensis (Ronniger & Saarsoo) Vassilcz., family Orobanchaceae (first published in Fl. URSS 22: 684 (1955)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Rhinanthus osiliensis, 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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