Foliage: The foliage of 'Blue Light' is typically dark green and deciduous, providing an attractive backdrop for its flowers. The leaves are pinnate, composed of multiple leaflets that contribute to a lush, full appearance.
Flowers: The defining feature of 'Blue Light' clematis is its large, double flowers. The blooms are a delicate shade of lavender-blue with a lighter central bar, creating a striking visual effect. Each flower has multiple layers of petals, giving it a full, ruffled appearance. The flowers are usually 4-6 inches in diameter. This clematis blooms in late spring to early summer, with a possible second, less profuse flowering in late summer to early fall.
Growth Habit: 'Blue Light' is a vigorous climber, reaching heights of 6-8 feet and spreading 3-4 feet wide. It climbs by twining around supports, making it suitable for trellises, fences, and arbors.
Growing Conditions
Light: This clematis thrives in full sun to partial shade. For the best flower production, provide at least 6 hours of sunlight per day. The roots prefer to be kept cool, which can be achieved by shading the base with mulch or low-growing plants.
Soil: 'Blue Light' prefers well-drained, fertile soil. It can adapt to various soil types, including sandy, loamy, and clay soils, but performs best in rich, well-draining soil.
Water: Regular watering is essential, especially during dry periods. Keep the soil consistently moist but not waterlogged.
Maintenance: This clematis requires moderate maintenance. Light pruning after the first flush of blooms in early summer can help shape the plant and encourage additional blooms. Perform more severe pruning in late winter or early spring before new growth begins. Pruning helps maintain a healthy structure and promotes vigorous new growth.
Cold Hardiness
USDA Zones: Clematis 'Blue Light' is hardy in USDA Zones 4 to 8. This means it can withstand winter temperatures down to -30°F to -20°F (-34°C to -28°C). In colder climates, providing some winter protection, such as mulching around the base, can help protect the roots.