Overview
Hieracium glaucum is a columnar upright herbaceous perennial in the genus Hieracium, part of the Asteraceae family, with deciduous foliage. Hieracium glaucum grows best in full sun, and tolerates most soils and any pH. Its UK hardiness is rated H5. Suggested uses include wildlife gardens, wildflower meadow and low maintenance.
About
Hieracium glaucum is a deciduous perennial cultivar within the Hieracium genus, known for its columnar upright habit. Like other Hieracium plants, it forms a basal rosette of leaves and produces open clusters of yellow flowerheads in summer. This cultivar thrives in full sun with a preference for south- or west-facing aspects, and it tolerates a range of soil types including chalk, loam, and sand, provided the soil is well-drained. Suitable for wildlife gardens and wildflower meadows, it is hardy to UK zone H5 and is best propagated by seed.
About the genus
Hieracium , known by the common name hawkweed and classically as hierakion, is a genus of flowering plant in the family Asteraceae, and closely related to dandelion (Taraxacum), chicory (Cichorium), prickly lettuce (Lactuca) and sow thistle (Sonchus), which are part of the tribe Cichorieae. Hawkweeds, with their 10,000+ recorded species and subspecies, do their part to make Asteraceae the second largest family of flowering plants. Some botanists group all these species or subspecies into approximately 800 accepted species, while others prefer to accept several thousand species.
Wikipedia contributors, "Hieracium", CC BY-SA 4.0 — Hieracium
Growing conditions
Best soil and position for Hieracium
- Sunlight
- Full sun
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Well-drained
- Aspect
- South-facing, West-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H5
Plant details
Hieracium glaucum size, habit and characteristics
- Plant type
- Herbaceous Perennial
- Habit
- Columnar upright
- Foliage
- Deciduous
- Suggested uses
- Wildlife gardens, Wildflower meadow, Low Maintenance
Care notes
Pruning and caring for Hieracium glaucum
- Propagation
- Seed
- Pest resistance
- Generally pest-free
- Disease resistance
- Generally disease-free
Frequently asked questions
Where is the best place to plant Hieracium glaucum?
Hieracium glaucum prefers full sun. It suits exposed and sheltered positions.
What soil does Hieracium glaucum need?
Hieracium glaucum is adaptable and grows happily in most soil types, including chalk, loam and sand. It is happy in soil of any pH. Aim for soil that stays well-drained.
Is Hieracium glaucum hardy in the UK?
Hieracium glaucum has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.
How do I propagate Hieracium glaucum?
Seed.
More in the Hieracium genus
- Hieracium lanatumHawkweed
- Hieracium villosumsilver shag
- Hieracium arnicoides
- Hieracium perpropinquum (Zahn) Pugsl.
- Hieracium perpropinquum Druce