About
Helianthemum is a genus of flowering plants in the family Cistaceae, often called rock rose. Species range from woody subshrubs to herbaceous annuals or perennials and bear solitary or clustered, five-petalled flowers. Flowering in the UK runs from May to September. Many species form symbiotic relationships with mycorrhizal fungi.
Wikipedia contributors, CC BY-SA 4.0 — Helianthemum
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
In the garden
Helianthemum belongs to the Cistaceae and includes forms from small herbaceous plants to woody subshrubs. The genus is widespread across the Northern Hemisphere, with many species recorded around the Mediterranean, and its flowers typically have five petals in shades of yellow, orange or pink. In the UK these plants flower from May to September, providing a steady show through the summer months. Growth habit and care vary considerably between species, so select a specific Helianthemum that matches your site and maintenance preferences. Several species are known to form partnerships with mycorrhizal fungi; in Mediterranean settings this association has been linked with improved performance on poor, dry soils and with reduced soil erosion. The seed capsules contain many seeds, which is useful for propagation where seed-raised forms are desired. Because some Helianthemum are woody while others are herbaceous, they can be used in different roles: lower-growing types suit gravelled or rock garden situations and mixes where a spreading ground cover is wanted, while taller subshrubs can be placed towards the back of mixed borders. Check species-level information before planting to match habit and lifespan to the intended position, and note the distinctive five-petalled flowers when choosing cultivars.
