Overview

Clematis 'John Treasure' (Vt) is a climbing climber wall shrub in the genus Clematis, part of the Ranunculaceae family, with deciduous foliage. Clematis 'John Treasure' (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 'John Treasure' is a climbing clematis in the buttercup family that produces flowers from May to September. It is a deciduous climber suited to full sun or partial shade and will grow in a wide range of soils from chalk to clay. Plant where roots can remain moist but well drained and choose an exposed or sheltered position on walls, fences or an obelisk. It works equally well in containers or trained into trees and mixed borders.

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 'John Treasure' belongs to the Ranunculaceae and is offered as a climbing cultivar for structural planting. Its season of interest runs from May to September, providing a sustained display along supports rather than a single flush. As a deciduous climber it uses its stems to ascend walls, fences, pergolas, obelisks and trees, and it is also listed for containers and mixed borders where vertical height is needed. Site and soil choices are broad: the plant tolerates chalk, clay, loam and sand and performs across acid, neutral and alkaline soils provided the position is moist but well drained. It will take full sun or partial shade and is comfortable on north-, south-, east- or west-facing aspects; exposure can be either sheltered or exposed, giving flexibility in urban and rural plots. Hardiness is H5, equivalent to hardy in typical UK gardens, so it will survive ordinary winter conditions without extra protection. For garden use, place it where its climbing stems can be tied to or guided along a support so the flowering period is shown to best effect. Use the suggested sites—walls, fences, obelisks, pergolas or trained into trees—to exploit its vertical habit and extend interest through late spring and into early autumn when homeowners value continuous flowering.

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 'John Treasure' (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 'John Treasure' (Vt)

Propagation

Cuttings, Layering, Seed

Pest resistance

Aphids, Capsid bugs, Caterpillars, Earwigs

Disease resistance

Powdery mildew, Clematis wilt

Frequently asked questions

More in the Clematis genus

• 
  Clematis 'Fukuzono' (I)
• 
  Clematis douglasiiChaparral Clematis
• 
  Clematis stans
• 
  Clematis × eriostemonClematis
• 
  Clematis × jouiniana
• Clematis 'Edward Prichard'clematis 'Edward Prichard'
• Clematis 'Fairydust' (Vt)
• Clematis 'Herbert Johnson' (EL)