Help us achieve our goals:
make a donation »
Join the RHS today and
support our charity
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Make a donation
Join the RHS today and support our charity
I have forgotten my password
Keep me signed in
Register for free to receive our newsletters, add comments to blogs/articles and to save content.
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.
When using this search
Search by plant name, key attributes or both to find plant details and a list of
AGM plants have been through a rigorous trial and assessment programme. They are:
the RHS today and get 12 months for the price of 9
Other common names
Clematis Avalanche Clematis × cartmanii 'Blaaval'
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 seedheads in autumn
Male Forsteri Group clematis are dwarf spreading or prostrate evergreen shrubs, usually dioecious, with deeply cut, trifoliate leaves and small cream or white, sometimes fragrant, male flowers
'Avalanche' is a bushy trailing or scrambling evergreen non clinging climber to a maximum height of 3m, with deeply dissected glossy, leathery, deep-green leaves. Panicles of pure white flowers to 4cm across, in early to mid spring
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect South-facing or East-facing or North-facing
Exposure Sheltered or Exposed
MoistureMoist but well-drained
SoilSand, Clay, Chalk, Loam
pHAcid, Alkaline, Neutral
1.5-2.5 metres / 2.5-4 metres
Time to ultimate height
Prefers well-drained, gritty soil in full sun or part shade with shelter. Plant with the crown at soil level. Can be grown in a container in a cold greenhouse or conservatory. See clematis cultivation for further information
Propagate by layering or semi-hardwood cuttings
Suggested planting locations and garden types
Flower borders and beds
City & Courtyard Gardens Cottage & Informal Garden Gravel Garden Patio & Container Plants Rock Garden
Pruning Clematis pruning: group one
Pests Young plants may be troubled by aphids
Clematis wilt and clematis slime flux may be occasional problems
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.
Join the RHS today and get 12 months for the price of 9