Subviolaceous hawkweed Plant Care
Hieracium subviolascens P.D.Sell
Updated · Sources · How we source care data
This plant is easily identified by its lance-shaped leaves covered in silver-gray hairs, giving it a stunning silvery appearance. Originating from the mountains of Central Europe, Hieracium subviolascens is highly sought after by plant collectors for its unique foliage and ability to thrive in rocky, alpine environments.
Every 7–14 days
Full sun to partial shade
65–75°F
50–70%
At a glance
How do you care for Subviolaceous hawkweed?
Water Subviolaceous hawkweed 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 65–75°F (18–24°C) and 50–70% humidity. Fertilize it every 2 months during the growing season.
Where Is the Subviolaceous hawkweed 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 Subviolaceous hawkweed?
Subviolaceous hawkweed (Hieracium subviolascens) belongs to the Asteraceae family within the Hieracium genus. Subviolaceous hawkweed is native to Europe.
Subviolaceous hawkweed displays a low rosette, clumping growth habit, reaching up to 1 ft tall with a spread of approximately 1 ft. Subviolaceous hawkweed produces small yellow clustered flowers in flat-topped clusters.
Leaf size: approximately 4 inches.
How Often Should You Water a Subviolaceous hawkweed?
Hieracium subviolascens 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 Subviolaceous hawkweed Need?
Subviolaceous hawkweed thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Subviolaceous hawkweed Prefer?
Hieracium subviolascens grows best at temperatures of 65–75°F. Subviolaceous hawkweed prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
65–75°F
Humidity
50–70%
What Soil Mix Works Best for a Subviolaceous hawkweed?
Well-draining loamy soil with added organic matter. Good drainage is essential for Subviolaceous hawkweed to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Subviolaceous hawkweed?
Feed Subviolaceous hawkweed 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 Subviolaceous hawkweed?
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 Subviolaceous hawkweed?
Subviolaceous hawkweed can be propagated through seeds, division of offsets. Similar propagation techniques also apply to white-flowered hawkweed plant care, which shares the same genus.
Is the Subviolaceous hawkweed Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Subviolaceous hawkweed, 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 Subviolaceous hawkweed?
Subviolaceous hawkweed is susceptible to aphids, spider mites, leaf miners. 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
Subviolaceous hawkweed 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 Hieracium genus — compare its care with other Hieracium species on PlantoScan.
Hieracium is part of the Asteraceae plant family — browse all Asteraceae genera and species.
Subviolaceous hawkweed thrives in bright light and direct sun — see other bright-light plants.
More Hieracium Species
Other Hieracium species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Hieracium subviolascens P.D.Sell, family Asteraceae (first published in Fl. Gr. Brit. Ireland 4: 551 (2006)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Subviolaceous hawkweed, 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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