Among
the most popular of climbers, Clematis has much to
offer apart from the familiar large-flowered hybrids. The
qualities of the species are increasingly recognized, and
many are now becoming widely available. There are also non-climbing
species such as C. heracleifolia, suitable for the
herbaceous border.
Registration of cultivars
The RHS is the International Cultivar Registration Authority for the genus Clematis.
Registration of Clematis cultivar names
RHS trials
Trials of many plants are carried out at RHS gardens. The very best performers will be recommended for the Award of Garden Merit.
Award of Garden Merit
List
of Award Clematis
Growing Clematis and problems
Various profiles on growing clematis are available online
Wisley staff have written Problem Profiles on two frequent difficulties with clematis:
Pruning overgrown clematis: The Garden (RHS) 124(1): 54-55 (1999)
Clematis slime flux: The Garden (RHS) 122(3): 200-201 (1997)
Further reading
This is just one topic covered by the Society's monthly journal for members, The Garden, and recent articles of interest are listed below. The latest thinking from the best minds in horticulture today is to be found in the RHS journal, The Plantsman: some recent relevant articles are suggested here.
Evison, R. 1999, March. AGM plants: Clematis alpina 'Helsingborg'. The Garden (RHS) 124(3): 178.
Evison, R. 1998, January. AGM plants: Clematis cirrhosa 'Freckles'. The Garden (RHS) 123(1): 50.
Evison, R. 1997, March. AGM plants: Clematis 'General Sikorski'. The Garden (RHS) 122(3): 195.
Evison, R. 1996, September. Containing clematis. The Garden (RHS) 121(9): 556-559. Clematis in containers.
Evison, R. 1994, August. The virtues of viticellas. The Garden (RHS) 119 (8): 348-351.
Evison, R. & V. Matthews (1994). Clematis cirrhosa. The New Plantsman 1(2): 95-101.
Feltwell, J. 1998, July. Roll of honour. The Garden (RHS) 123(7): 480-483. Clematis breeding in Poland.
Fry, T. 2000, March. Containing clematis. The Garden (RHS) 125(3): 164-167. Clematis in containers.
Grey-Wilson, C. (1986). Clematis orientalis - a much confused species. The Plantsman 7(4): 193-204.
Oviatt-Ham, M. 1996, March. Miniature belles. The Garden (RHS) 121(3): 140-145. Clematis section Atragene.
Savill, R. 2000, April. In from the cold. The Garden (RHS) 125(4): 272-275. Cultivars from Eastern Europe.