Overview
Helianthemum 'Highdown' is a bushy, spreading branched shrubs in the genus Helianthemum, part of the Cistaceae family, with evergreen foliage. Helianthemum 'Highdown' grows best in full sun, and tolerates most soils and alkaline and neutral pH. Its UK hardiness is rated H4. Suggested uses include coastal, cottage and informal garden, gravel garden and rock garden.
About
Helianthemum 'Highdown' is a cultivar of the evergreen shrub genus Helianthemum, known for its bushy and spreading branched habit. These plants have small, paired leaves and produce saucer-shaped flowers in spring and early summer. 'Highdown' thrives in full sun and prefers well-drained, fertile soils such as chalk, loam, or sand with neutral to alkaline pH. Suitable for coastal, cottage, gravel, and rock gardens, it is hardy to UK zone H4 and can be propagated by softwood cuttings in late spring or early summer.
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
- H4
Plant details
Helianthemum 'Highdown' size, habit and characteristics
- Plant type
- Shrubs, Alpine Rockery
- Habit
- Bushy, Spreading branched
- Foliage
- Evergreen
- Suggested uses
- Coastal, Cottage and informal garden, Gravel garden, Rock garden
Care notes
Pruning and caring for Helianthemum 'Highdown'
- Propagation
- Propagate by softwood cuttings in late spring or early summer
- Pest resistance
- Generally pest-free
- Disease resistance
- May be susceptible to honey fungus in gardens where it is present but insufficient data to determine degree of susceptibility
Frequently asked questions
Where is the best place to plant Helianthemum 'Highdown'?
Helianthemum 'Highdown' prefers full sun. It suits exposed and sheltered positions.
What soil does Helianthemum 'Highdown' need?
Helianthemum 'Highdown' 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.
Is Helianthemum 'Highdown' hardy in the UK?
Helianthemum 'Highdown' has an RHS hardiness rating of H4, meaning it is hardy through an average UK winter, tolerating -10 to -5°C.
How do I propagate Helianthemum 'Highdown'?
Propagate by softwood cuttings in late spring or early summer.
More in the Helianthemum genus
- Helianthemum 'Wisley Pink'Rock Rose
- Helianthemum canariense
- Helianthemum hybrids
- Helianthemum lippii
- Helianthemum nummulariumcommon rockrose
- Helianthemum oelandicum subsp. alpestrealpine sun rose
- Helianthemum 'Ben Dearg'
- Helianthemum 'Bishopsthorpe'