Helianthemum 'WISLEY PRIMROSE'

Helianthemum
Helianthemum 'WISLEY PRIMROSE'
rock rose
SIZE/TYPE low or groundcovering
 low perennial
USUAL HEIGHT 0.2-0.3m
USUAL WIDTH 0.3-0.8m
LEAVES evergreen broadleaf
COLOUR OF LEAVES blue-green
FLOWERS showy
COLOUR OF FLOWERS yellow
BLOOMING TIME May - June
LOCATION full sun
USDA zone (lowest) 5   (down to -29°C)
WINTER PROTECTION  
FOR ZONE 5+6 Code of winter protection zone 5+6
FOR ZONE 7 Code of winter protection zone 7
BELONGS TO CATEGORIES Perennials
Evergreen broadleaf
náhled foto

Rock roses are popular ground-covering perennials available in many attractive colours. Wisley Primrose is a another rock rose variety named after the RHS garden at Wisley. It makes shiny primrose yellow flowers atop slightly taller stems (25-30 cm) which open from nodding buds for about 4 weeks, beginning in late May. In summer it sporadically re-blooms offering a few flowers on the plant every now and then.

Once the main flowering season has finished (late June) reduce the size of the whole plant to a half by trimming. It will encourage growth of new foliage and the plant will look tidy and bushy until the next spring. Rock rose is a low, ground-covering or mound-forming semi-woody perennial with evergreen foliage. The short and linear leaves are rosemary-like, blue green to silvery grey, matte. Pruning may be followed by a dose of a good fertilizer if you want a bushy and lush looking evergreen cushion.

Rock roses are low, spreading plants, ideal for rockeries or dry slopes that grow well in common garden soil, too, provided it is well-drained. They love full sun and neutral to slightly alkaline soil that must not remain wet. Hardy to about -29°C (USDA zone 5).

Last update 12-12-2019
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Helianthemum
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Helianthemum
GLOSSARY
  • STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
  • DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
  • EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
  • STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
  • HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
  • SHRUB - a woody plant with branches growing bushy from the ground level.
  • HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
  • FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
  • GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
LARGE PLANTS over 150 cmspecimens, screening and hedging shrubs

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