Clematis 'Kasmu' (Vt) — Climbing

Overview

Clematis 'Kasmu' (Vt) is a climbing climber wall shrub in the genus Clematis, part of the Ranunculaceae family, with deciduous foliage. Clematis 'Kasmu' (Vt) grows best in full sun and partial shade, and tolerates most soils and any pH. Its UK hardiness is rated H5. Suggested uses include climbers, walls, fences, obelisks, pergolas, trees, containers and mixed borders.

About

Clematis 'Kasmu' is a deciduous climbing clematis that provides an extended flowering run from May to September. It climbs to make use of vertical space and is suitable for training onto walls, pergolas, fences, obelisks and trees. Plant it in full sun or partial shade in moist but well‑drained soil; it tolerates chalk, clay, loam and sand across acid to alkaline pH and is H5 hardy in the UK. It also works in containers and mixed borders where a climbing habit is required.

About the genus

Clematis is a genus of about 380 species within the buttercup family, Ranunculaceae. Their garden hybrids and cultivars have been popular among gardeners, beginning with Clematis 'Jackmanii', a garden staple since 1862. More cultivars are being produced constantly, mainly of Chinese and Japanese origin.

Wikipedia contributors, "Clematis", CC BY-SA 4.0 — Clematis

In the garden

Clematis 'Kasmu' is a cultivated member of the genus Clematis in the Ranunculaceae and is used as a climbing ornamental on vertical supports. As a deciduous climber it produces its flowering display from May to September and can be trained up walls, fences, pergolas and obelisks or woven into trees to extend the season of interest. Site choice should favour full sun or partial shade. The plant tolerates a wide range of soil types — chalk, clay, loam and sand — and a full spectrum of pH from acid to alkaline, provided the soil is moist but well drained. It will perform on north, south, east and west aspects and can handle both exposed and sheltered positions. The H5 hardiness rating means it is considered hardy across most of the UK garden range. Use Clematis 'Kasmu' where upright structure is needed: train it up a fence, plant beside an obelisk in a mixed border, or grow in a deep container with a stout support. Its deciduous habit means stems are bare in winter, but its extended May–September flowering period helps fill gaps through the summer on vertical features in the garden.

Growing conditions

Best soil and position for Clematis

Sunlight: Full sun, Partial shade
Soil type: Chalk, Clay, Loam, Sand
Soil pH: Acid, Alkaline, Neutral
Soil moisture: Moist but well-drained
Aspect: North-facing, South-facing, East-facing, West-facing
Exposure: Exposed, Sheltered
UK hardiness: H5

Plant details

Clematis 'Kasmu' (Vt) size, habit and characteristics

Plant type: Climber Wall Shrub
Habit: Climbing
Foliage: Deciduous
Suggested uses: Climbers, Walls, Fences, Obelisks, Pergolas, Trees, Containers, Mixed borders

Care notes

Pruning and caring for Clematis 'Kasmu' (Vt)

Propagation: Cuttings, Layering, Seed
Pest resistance: Aphids, Capsid bugs, Caterpillars, Earwigs
Disease resistance: Powdery mildew, Clematis wilt

Frequently asked questions

Where is the best place to plant Clematis 'Kasmu' (Vt)?

Clematis 'Kasmu' (Vt) prefers full sun and partial shade. It suits exposed and sheltered positions.

What soil does Clematis 'Kasmu' (Vt) need?

Clematis 'Kasmu' (Vt) is adaptable and grows happily in most soil types, including chalk, clay, loam and sand. It is happy in soil of any pH. Aim for soil that stays moist but well-drained.

Is Clematis 'Kasmu' (Vt) hardy in the UK?

Clematis 'Kasmu' (Vt) has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.

How do I propagate Clematis 'Kasmu' (Vt)?

Cuttings, Layering, Seed.

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