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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
mint
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
Kód zimní ochrany zóna 5+6
for zone 7
Kód zimní ochrany zóna 7
categorized
Description of the plant:
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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