Overview
Helianthemum 'Supreme' is a bushy, spreading branched shrubs in the genus Helianthemum, part of the Cistaceae family, with evergreen foliage. It typically grows around 0.1-0.5 metres tall and 0.1-0.5 metres wide, reaching full size in around 2-5 years. Helianthemum 'Supreme' grows best in full sun, and tolerates most soils and alkaline and neutral pH. Its UK hardiness is rated H5. Suggested uses include gravel garden, rock garden, wildlife gardens and banks and slopes.
About
Helianthemum 'Supreme' (rock rose 'Supreme') is a bushy, spreading branched evergreen shrub belonging to the genus Helianthemum in the Cistaceae family. It typically grows to a height and spread of 0.1 to 0.5 metres, reaching full size within 2 to 5 years. This cultivar thrives in full sun on south- or west-facing aspects and can tolerate both exposed and sheltered conditions. It prefers well-drained alkaline or neutral soils such as chalk, loam, or sand, and provides seasonal interest throughout spring, summer, and winter.
About the genus
Helianthemum, known as rock rose, sunrose, rushrose, or frostweed, is a genus of about 114 species of flowering plants in the family Cistaceae. They are widely distributed throughout the Northern Hemisphere, especially in the Mediterranean.
Wikipedia contributors, "Helianthemum", CC BY-SA 4.0 — Helianthemum
Growing conditions
Best soil and position for Helianthemum
- Sunlight
- Full sun
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Alkaline, Neutral
- Soil moisture
- Well-drained
- Aspect
- South-facing, West-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H5
Plant details
Helianthemum 'Supreme' size, habit and characteristics
- Plant type
- Shrubs, Alpine Rockery
- Habit
- Bushy, Spreading branched
- Foliage
- Evergreen
- Height
- 0.1-0.5 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- Gravel garden, Rock garden, Wildlife gardens, Banks and slopes
Care notes
Pruning and caring for Helianthemum 'Supreme'
- Cultivation
- Prefers full sun and well-drained alkaline or neutral soils. Suitable for gravel and rock gardens. Tolerates exposed and sheltered conditions. Requires minimal watering once established.
- Pruning
- Light pruning after flowering to maintain shape and encourage bushiness.
- Propagation
- Seed sown in autumn, Softwood cuttings in late spring or early summer
- Pest resistance
- Generally pest-free
- Disease resistance
- May be susceptible to honey fungus
Frequently asked questions
How do I grow Helianthemum 'Supreme'?
Prefers full sun and well-drained alkaline or neutral soils. Suitable for gravel and rock gardens. Tolerates exposed and sheltered conditions. Requires minimal watering once established.
Where is the best place to plant Helianthemum 'Supreme'?
Helianthemum 'Supreme' prefers full sun. It suits exposed and sheltered positions.
What soil does Helianthemum 'Supreme' need?
Helianthemum 'Supreme' is adaptable and grows happily in most soil types, including chalk, loam and sand. It prefers alkaline and neutral soil. Aim for soil that stays well-drained.
How do I prune Helianthemum 'Supreme'?
Light pruning after flowering to maintain shape and encourage bushiness.
How big does Helianthemum 'Supreme' grow?
Helianthemum 'Supreme' reaches a height of 0.1-0.5 metres and a spread of 0.1-0.5 metres. It takes around 2-5 years to reach full size.
Is Helianthemum 'Supreme' hardy in the UK?
Helianthemum 'Supreme' 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 Helianthemum 'Supreme'?
Seed sown in autumn, Softwood cuttings in late spring or early summer.
