Clematis

Also known as: Clematis, Leather flower, Virgin's bower

Clematis are versatile, deciduous climbing vines with opposite, compound leaves and a profusion of showy flowers in a wide range of colours including white, pink, red, purple, and blue. The flowers vary in form from single to double, and are followed by attractive, silky seed heads. These woody-stemmed plants can reach heights from 1.5 to 3 metres or more, depending on the variety, and are prized for their long flowering season and ability to clothe walls, fences, pergolas, and obelisks with vibrant colour.

Scientific classification

Species: Clematis (Clematis spp.)
Genus: Clematis
Family: Ranunculaceae

Toxic if ingested, may cause skin irritation and digestive upset in humans and pets.
Toxicity: Climber · Climber Wall Shrub · Perennial
Plant type: 1.5 - 3 metres
Height: Information to be completed
Spread: Deciduous
Foliage: Climbing
Habit: Spring · Summer
Season of interest: Full sun · Partial shade
Sunlight: Information to be completed
Ideal temperature

Clematis pictures

Distribution of Clematis

Distribution map

Temperate regions of the Northern Hemisphere, particularly China and Japan, with some species in North America and Europe.

Information to be completed

Culture

Information to be completed

Toxicity

Toxic if ingested, may cause skin irritation and digestive upset in humans and pets.

Quick identification of Clematis

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Clematis care guide

Keep soil moist and well-drained, mulch to retain moisture
Watering: Full sun · Partial shade
Sunlight: Information to be completed
Ideal temperature

Watering

Keep soil moist and well-drained, mulch to retain moisture

Fertilizing

Monthly during growing season with low-nitrogen fertilizer

Pruning

Pruning depends on the flowering group: for early-flowering types (Group 1), prune lightly after flowering; for large-flowered hybrids (Group 2), remove dead or weak stems in late winter and cut back to strong buds; for late-flowering types (Group 3), cut all stems back to about 30 cm above ground in late winter or early spring. Always use clean, sharp secateurs.

Propagation

Propagate by semi-ripe cuttings taken in midsummer. Select strong, non-flowering shoots about 10-15 cm long, remove the lower leaves, dip the base in rooting hormone, and insert into a mix of equal parts peat and perlite. Keep in a propagator or covered with a plastic bag at 18-20°C. Alternatively, layer in autumn or spring by pegging a stem into the soil; roots usually form within a year. Seeds can be sown in autumn but germination is slow and variable.

Growing

Grow Clematis in moist but well-drained fertile soil, ideally with the roots kept cool and shaded by other plants or a mulch layer while the top growth enjoys full sun or partial shade. Water regularly during dry spells, especially in summer, to keep the soil evenly moist. Apply a balanced liquid fertiliser every 4-6 weeks from early spring to midsummer. In autumn, mulch around the base with well-rotted organic matter to protect roots from frost. Good air circulation helps prevent diseases.

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Common pests and diseases

Diseases

Clematis are susceptible to clematis wilt (caused by *Phoma clematidina*), which can cause sudden collapse of shoots, especially in large-flowered hybrids. Powdery mildew may also occur in dry, humid conditions. Good air circulation and removing infected debris helps reduce risk.

Pests

Common pests include aphids (greenfly and blackfly), red spider mites, and leaf miners. Slugs and snails may attack young shoots. Regular monitoring and early treatment with appropriate organic or chemical controls is recommended.

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