Photo: TR001CC BY 3.0via Wikimedia Commonsresized / cropped
Hieracium lachenalii var. radyrense Plant Care
Hieracium radyrense (Pugsley) P.D.Sell & C.West
Updated · Sources · How we source care data
Hieracium radyrense, the Radyr hawkweed, is a very rare endemic species restricted to Radyr in south Wales, UK. First identified in 1907 it was described as a variety in 1948 and a species in 1955. and belongs to Hieracium section Vulgata. It has rarely been seen and surveys between 1998 and 2004 indicate that only one population of about 25 plants survives.
Full sun to partial shade
At a glance
How do you care for Hieracium lachenalii var. radyrense?
Hieracium lachenalii var. radyrense grows best in full sun to partial shade.
What Is the Hieracium lachenalii var. radyrense?
Hieracium lachenalii var. radyrense (Hieracium radyrense) belongs to the Asteraceae family within the Hieracium genus.
Hieracium lachenalii var. radyrense displays a low rosette, clumping growth habit, reaching up to tall with a spread of approximately . Hieracium lachenalii var. radyrense produces small yellow clustered flowers in flat-topped clusters.
What Light Does the Hieracium lachenalii var. radyrense Need?
Hieracium lachenalii var. radyrense thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Soil Mix Works Best for a Hieracium lachenalii var. radyrense?
Well-draining loamy soil with added organic matter. Good drainage is essential for Hieracium lachenalii var. radyrense to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Hieracium lachenalii var. radyrense?
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 lachenalii var. radyrense?
Hieracium lachenalii var. radyrense 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 lachenalii var. radyrense Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Hieracium lachenalii var. radyrense, 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 lachenalii var. radyrense?
Hieracium lachenalii var. radyrense 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
Hieracium lachenalii var. radyrense 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 lachenalii var. radyrense 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 radyrense (Pugsley) P.D.Sell & C.West, family Asteraceae (first published in Watsonia 3: 236 (1955)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Hieracium lachenalii var. radyrense, 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: TR001, CC BY 3.0, Wikimedia Commons — original.
- 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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