About
Clematis 'Denny's Double' is a deciduous climbing plant that reaches heights of approximately 2.4 meters. It features mid-green foliage and produces double flowers in a pale lavender-mauve hue that transitions to a softer blue as they mature. Each flower measures about 15 centimeters in diameter and showcases creamy-yellow anthers. The blooms consist of multiple layers of elongated tepals, which become shorter toward the center, and may include a collar of lilac-green tepals. This variety flowers from late spring to early summer, with a secondary bloom period in late summer.
About the genus
Clematis includes a variety of plants, ranging from deciduous and evergreen shrubs to herbaceous perennials. Many of these species are climbers, utilizing twining leaf stalks for support, and they frequently produce prominent flowers. In the fall, certain varieties develop appealing fluffy seed heads.
Growing conditions
- Sunlight
- Full sun, Partial shade
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Sheltered
- UK hardiness
- H6
Plant details
- Plant type
- Climber Wall Shrub
- Habit
- Climbing
- Foliage
- Deciduous
- Height
- 2.5-4 metres
- Spread
- 1.5-2.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- City and courtyard gardens, Cottage and informal garden
- Toxicity
- Skin irritant. Wear gloves and other protective equipment when handling. Pets (rabbits): Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Care notes
- Cultivation
- Plant in moisture-retentive, well-drained soil, with the roots and base of the plant kept cool and shaded by other plants or a layer of pebbles at the base. Plant with the crown 5-8cm deep to encourage new shoots to grow from below ground level. See clematis cultivation
- Pruning
- Pruning (clematis) group 2
- Propagation
- Propagate by softwood cuttings in spring, semi-ripe cuttings in early summer or layering
- Pest resistance
- May be susceptible to aphid, slug, snail or caterpillar damage on young growth
- Disease resistance
- May be susceptible to honey fungus (rarely), clematis wilt and clematis slime flux