Photo: Marios ThomaCC BY 4.0via iNaturalistresized / cropped
Troodos Bugloss Plant Care
Onosma troodi Kotschy
Updated · Sources · How we source care data
With its striking hairy leaves covered in silvery-gray tomentum, this unique plant originates from the Troodos Mountains in Cyprus. Plant collectors are drawn to Onosma troodi for its rare and attractive appearance, making it a prized addition to any botanical collection.
Every 7–14 days
Full sun to partial shade
50–80°F
40–60%
At a glance
How do you care for Troodos Bugloss?
Water Troodos Bugloss every 7–14 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 40–60% humidity. Fertilize it every 2 months during the growing season.
Where Is the Troodos Bugloss Native To?
What Is the Troodos Bugloss?
Troodos Bugloss (Onosma troodi) belongs to the Boraginaceae family within the Onosma genus. Troodos Bugloss is native to Cyprus.
Troodos Bugloss displays a low rosette, spreading growth habit, reaching up to 1 ft tall with a spread of approximately 1 ft. Troodos Bugloss produces small tubular flowers in shades of blue, purple, or white.
Leaf size: approximately 3 inches.
How Often Should You Water a Troodos Bugloss?
Onosma troodi requires watering every 7–14 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 7–14 days
Let soil partially dry between waterings
What Light Does the Troodos Bugloss Need?
Troodos Bugloss thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Troodos Bugloss Prefer?
Onosma troodi grows best at temperatures of 50–80°F. Troodos Bugloss prefers humidity levels of 40–60%.
Temperature
50–80°F
Humidity
40–60%
What Soil Mix Works Best for a Troodos Bugloss?
Well-draining sandy soil with good organic content. Good drainage is essential for Troodos Bugloss to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Troodos Bugloss?
Feed Troodos Bugloss 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 Troodos Bugloss?
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 Troodos Bugloss?
Troodos Bugloss can be propagated through seeds, division of clumps. Similar propagation techniques also apply to onosma fruticosa plant care, which shares the same genus.
Is the Troodos Bugloss Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Troodos Bugloss, 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 Troodos Bugloss?
Troodos Bugloss is susceptible to aphids, 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 Troodos Bugloss Need?
Troodos Bugloss grows outdoors in USDA Zone 8a – 9b. It survives winters down to planting zone 8a. Troodos Bugloss is native to Cyprus.
Hardiness Zone
Zone 8a – 9b
Keep exploring plants
Troodos Bugloss 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 Onosma genus — compare its care with other Onosma species on PlantoScan.
Onosma is part of the Boraginaceae plant family — browse all Boraginaceae genera and species.
Troodos Bugloss 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: Onosma troodi Kotschy, family Boraginaceae (first published in Ins. Cypern : 283 (1865)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Troodos Bugloss, 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: Marios Thoma, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 8a – 9b, 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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