Helianthemum Nummularium (Rock rose)
A dwarf evergreen with shrubby growth habit which has lovely flowers in a range of white, cream, pink and deep rose red.
This is a small shrubby plant with evergreen foliage, and lovely 5 petalled white, cream, pink, or rose red flowers in December and January. Each flower opens for only one day, but in the proper growing environment, bloom can be so profuse as to cover the entire plant to the point of obscuring the foliage. It has greyish-green, lance-shaped leaves (5 cm long).
Its ideal planting condition is dry well drained alkaline soil , in full sun. Plants prefer cool summers and warm winters. Prune them back with shears to retain their shape and to encourage regrowth.
It doesn’t have any major disease problems but plants will rot if left with wet feet.
Sow indoors at any time. Sow into a cold frame in autumn. Indoors, surface sow onto moist well-drained seed compost. Just cover seed with a sprinkling of soil. Light is needed for germination. Place in a propagator or cover seed with a sheet of glass or plastic. Ideal temp. 18°C for 6-8 weeks, if germination does not occur put into a fridge ( vege compartment is good) at 5°C for 6-8 weeks then return to warmth for germination. Germination takes 15-120 days and is erratic. For cold frame sowing, allow autumn warmth followed by natural winter cold to offer ideal conditions for germination to occur in spring as the weather warms. Transplant seedlings when large enough to handle to individual pots and grow on. Acclimatise and plant out after danger of frost has passed.
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