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We have combined these two powerful search tools into a single Find a Plant service searching over 250,000 plant records.
Virtually all of the features of the old searches are still available and in addition we have added several new features to create a more comprehensive and user friendly search experience.
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AGM plants have been through a rigorous trial and assessment programme. They are:
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Other common names
Clematis can be deciduous or evergreen shrubs or herbaceous perennials, mostly climbing by twining leaf-stalks, and often with showy flowers. Some have attractive fluffy seed-heads in autumn
C. × durandii is a medium-sized deciduous, non-twining sub-shrub with long stems bearing simple ovate leaves to 12cm in length. Flowers 10cm across, with four to six indigo-blue sepals have a central tuft of white and golden yellow stamens. Flowers early summer to early autumn
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect North-facing or South-facing or East-facing or West-facing
Exposure Sheltered or Exposed
MoistureMoist but well-drained
SoilChalk, Clay, Sand, Loam
Time to ultimate height
Plant in a moisture-retentive, well-drained soil. Keep the base of the plant and roots cool and shaded by other plants or a layer of pebbles or flat stones at the base. Plant with the crown of the clematis at soil level. Mulch in late winter with garden compost or well-rotted manure, avoiding the immediate crown. Ideal for a border where it can be supported by other plants
Propagate by layering or semi-hardwood cuttings
Suggested planting locations and garden types
Pruning Clematis pruning: group three
Pests Young shoots may be troubled by aphids and caterpillars; petals can be eaten by earwigs
May suffer from clematis slime flux
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Join the RHS today and get 12 months for the price of 9