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Clematis x cartmanii Avalanche


One of the largest flowered evergreen varieties

This is a scrambling evergreen, non-clinging climber that reaches a height of 3m and is characterised by its bronze-purple markings, its deep green, deeply dissected, shiny, leathery leaves, this sees a bloom of large fragrant pure white flowers in spring.


Used as groundcover, can be trained along a wall or fence, in flower borders and beds, gardens also possible to grow in containers.


Prefers well-drained gritty soil in full sun or part shade with shelter. Prune lightly after flowering aiming to simply remove dead flower heads.

This variety was developed by Blackthorn Nursery, England by Mr Robin White, a renowned Botanist. Pruning Group 1.

Plant details

In depth plant information

Property Value
Plant type Clematis, Climber
Flower colour
Foliage colour
Typically available March - September
Season of interest Autumn
Flowering March - May
Evergreen Yes
Plant height 150 cm - 250 cm
Plant width 150 cm - 250 cm
Fragrant flowers Yes
Attracts bees No
Attracts butterflies No
Plant height in 5 years 130 cm
Hardiness zone (?) H4

Will perform best in these conditions

Property Value
Soil type Chalk, Loam, Sand
Light exposure Full sun, Part shade
Soil drainage Well drained, Medium
Planting instructions

Water the plant in its pot thoroughly before planting – give it a good soaking. Prepare the area by digging a hole twice the size of the pot at least 15cm away from the wall, fence or support. Dig compost into the base of the hole. Remove the pot and position the plant – along with its supporting cane in the hole, leaning onto the support. The top of the rootball needs to be 8cm below the level of the surrounding soil. Refill the planting hole with a mixture of garden soil and compost, firming as you go. Arrange and tie the stems onto the support. Water in well and keep well watered during the plant's first year. Mulch with bark chippings or stones to keep the roots cool.

Planting site Gravel garden, Patio container, Rock garden, Cottage garden, Informal garden, City garden, Courtyard garden, Flower border and beds

Typically available

From March to September