Growing advice


Helianthemums or Rock Roses

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Bright flowers and easy to grow!  One of our specialities.

Helianthemums flower

  • Enjoy sunshine
  • Easy in most soils
  • Low maintenance
  • Range of bright colours

The Helianthemums or 'Rock Roses' are some of the most popular plants we sell and for good reason. They grow quickly even in less than ideal soil, flower profusely, come in a wide range of colours and the foliage is often attractive in low, spreading mounds. They are low-maintenance plants that will fit in so many places in the garden like over walls, path edges and in mixed borders - not only rockeries.

Helianthemums are hardy, low, spreading bushes that flower in late spring/early summer. Each flower only lasts a day or two but they are produced in such quantity that the show lasts a few weeks and many plants will flower a second time. It's a good idea to trim off the faded flower shoots as this helps to keep the plant neat and tidy and will encourage the plant to produce another crop of flowers later in summer. If the plants do get old and woody and perhaps too untidy then they may be pruned back. Pruning is best done in early spring but is possible at any time during the growing season. That is the only maintenance the plants should need.

The Rock Roses have only two basic needs - sunshine and a free-draining soil. They will survive, or even thrive, in poor, sandy soils as the plants are very drought tolerant. They sometimes have a reputation as being short-lived but this isn't necessarily true. If totally neglected, then yes, they will become woody and bare-stemmed but the simple pruning treatment mentioned above should prevent that. I heard from one customer who had a plant growing happily in the same position for nearly 40 years!

There are hundreds of Helianthemum varieties (cultivars) to choose from and we offer an excellent range with flowers spanning the colour spectrum from white to yellow, through paler pinks and apricots, to vibrant pinks and reds with some orange and some flowers have contrasting central eyes. We also have a few double-flowered varieties ('double' flowers have many petals clustered into a bud, like a rose flower).

Helianthemum 'Wisley Primrose'Helianthemum 'Red Dragon'Helianthemum 'Rhodanthe Carneum'

Helianthemums are evergreen or almost so; they may lose leaves in a hard winter or exposed position but soon recover in spring. The foliage of many varieties is an attractive silvery grey colour, covered with minute hairs. Those grey-leaved ones look especially good in bright sunshine but the smooth, dark-leaved varieties are also attractive and help contrast with the brightly coloured flowers.

A special note about the 'Ben' Helianthemums - Ben Fhada, Ben Hope, Ben Ledi and Ben More (there exist a few more Bens). These were bred by an amateur grower, John Nicoll of Monifieth, in the east of Scotland and all named after Scottish hills. It is a marvel that the selfless work of an amateur, maybe one hundred years ago (Mr Nicoll died in 1926) continues to be grown today. Ben Fhada, for example, is still as good a variety as anything more modern and retains good vigour. Not many people know of Mr Nicoll but his achievements live on.

We are big fans of Rock Roses - they are ideal for new gardens and new gardeners, for any sunny place and can even look good planted in a large pot or container. They are not for planting near all those special little alpine gems but for so many other situations they are the number one choice. Our collection of 8 Helianthemum plants is an excellent introduction for trying these wonderful plants in your garden.