Photo: la la means I love youCC BY-SA 3.0via Wikimedia Commonsresized / cropped
Hieracium boreale Plant Care
Hieracium vagum Jord.
Updated · Sources · How we source care data
This plant's most distinctive feature is its bright yellow flowers resembling dandelions. Originally from Europe, Hieracium vagum is a favorite among plant collectors for its ability to thrive in a variety of conditions and its unique appearance.
Every 7–10 days
Full sun to partial shade
60–75°F
50–70%
At a glance
How do you care for Hieracium boreale?
Water Hieracium boreale 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 60–75°F (16–24°C) and 50–70% humidity. Fertilize it every month during the growing season.
Where Is the Hieracium boreale 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 Hieracium boreale?
Hieracium boreale (Hieracium vagum) belongs to the Asteraceae family within the Hieracium genus. Hieracium boreale is native to Europe. Hieracium boreale is also known as Hieracium boreale var. calvatum, Hieracium boreale var. vagum, Hieracium boreale subsp. vagum.
Hieracium boreale displays a low rosette, clumping growth habit, reaching up to 2 ft tall with a spread of approximately 1 ft. Hieracium boreale produces small yellow clustered flowers in flat-topped clusters.
Leaf size: approximately 3 inches.
How Often Should You Water a Hieracium boreale?
Hieracium vagum 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 Hieracium boreale Need?
Hieracium boreale thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Hieracium boreale Prefer?
Hieracium vagum grows best at temperatures of 60–75°F. Hieracium boreale 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 Hieracium boreale?
Well-draining loamy soil with added organic matter. Good drainage is essential for Hieracium boreale to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Hieracium boreale?
Feed Hieracium boreale every month 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 month
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Hieracium boreale?
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 Hieracium boreale?
Hieracium boreale 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 Hieracium boreale Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Hieracium boreale, 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 Hieracium boreale?
Hieracium boreale 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.
What USDA Hardiness Zone Does the Hieracium boreale Need?
Hieracium boreale grows outdoors in USDA Zone 4a – 8b. It survives winters down to planting zone 4a. Hieracium boreale is native to Europe.
Hardiness Zone
Zone 4a – 8b
Keep exploring plants
Hieracium boreale 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.
Hieracium boreale 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 vagum Jord., family Asteraceae (first published in Cat. Graines Jard. Bot. Grenoble 21. 1849 [Dec 1849]) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Hieracium boreale, 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: la la means I love you, CC BY-SA 3.0, Wikimedia Commons — 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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