Clethra
Clethra alnifolia should be more widely grown. It is not fastidious except in the question of soil which must be free of any hint of lime. It associates contentedly with rhododendrons and in September, as the pulse of the garden slows, the cream-white spiked trusses open and fill the air for some distance with a delicate fragrance.
The blue flowers with a warmth which reminds me of Gentiana verna, open in July, while the foliage turns a good deep red in autumn. My bushes are never much more than 3 ft. in height making just the right companion for the glaucous-leaved rue.
Cercis siliquastrum always looks in need of a thorough spring clean to me. Even when the branches are clothed during June in lilac-purple flowers I still take a somewhat jaundiced view of a tree most gardeners revere. The best specimens I have ever seen grew on a lime soil over gravel and were especially attractive, so the proud.
Cuttings of semi-ripened wood taken in July – August root easily in a sand frame. The only pruning I do is to remove damaged shoots.
The rock roses are Mediterranean shrubs which like light, free-draining soil and a warm sunny position. Three varieties of those tried in my garden lived seven years, and cuttings taken from them continue to grace the garden in a sheltered bed by the house.
Cistus x corbariensis, with olive-green leaves and in due season crimson buds which open to pure white flowers, is an aromatic shrub of quality. C. x cyprius is a splendid hybrid, which at 6 ft. is taller by 18 in. than corbariensis with each white petal stained at the base with deep scarlet. I prefer C. laurifolius to all others because it lingers longer in my company. The flowers are creamy white deepening to yellow at the base. Had I a paved terrace with sheltering walls then I would grow hybrids like C. x purpureus with flowers of rosy crimson blotched brown, or better still Silver Pink or even ladaniferus to cheer the July days with Mediterranean flamboyance. Cuttings taken more or less at any time during growing season, or seed, will ensure a creditable increase for effort expended.
