Clematis montana Grandiflora

Clematis montana Grandiflora

Why Buy Me?

• Lovely single white flowers
• A vigorous grower
• Ideal for covering walls and pergolas

Growing Conditions

Light:
Full sun to partial shade. Thrives in a position with at least 6 hours of sunlight daily. In warmer regions, light afternoon shade helps preserve foliage and prolong bloom duration. Tolerates more shade than many other clematis varieties.

Soil:
Moist, well-drained, moderately fertile soil. Prefers loamy or sandy soils with neutral to slightly alkaline pH. Avoid waterlogged conditions and compacted soils that can cause root rot.

Exposure:
Best suited to sunny or semi-sheltered spots on fences, walls, pergolas, trellises, or scrambling over trees. Fast-growing and vigorous, ideal for creating natural screens. Shade the root zone with mulch or low-growing plants.

Drought Tolerance:
Moderate to high once established. Requires regular watering during establishment, but mature plants are fairly drought-tolerant.

Cultivation & Care

Planting Time:
Plant in early spring or autumn when the soil is moist and workable. Autumn planting allows the plant to develop a strong root system before winter.

Spacing:
Space 2–3 m (6–10 ft) apart from other climbers or structures. Grows 6–10 m (20–33 ft) tall with suitable support, forming a dense, scrambling mass.

Watering & Fertilization:
Water deeply during dry periods, especially during the first year. Feed in early spring with a balanced, slow-release fertilizer to support growth and flowering.

Mulching & Pruning:
Mulch annually in early spring to retain moisture and protect roots.
Pruning group 1:

• Flowers on old wood.

• Minimal pruning is required — prune only to shape or reduce size after flowering (late spring to early summer).

• Remove dead or damaged stems at the same time.

Propagation:
Propagate by layering or semi-ripe cuttings in summer. As a named cultivar, vegetative propagation ensures consistency in flower form and colour.

Seasonal Interest

Spring:
Abundant, pure white, four-petaled flowers cover the plant from late April to May. Flowers are 5–7 cm across with creamy-yellow stamens and a light, fresh fragrance. New foliage emerges flushed with bronze, maturing to green.

Summer:
Provides dense green foliage cover, useful for privacy and screening. No further flowering, but maintains a vigorous leafy presence.

Autumn:
Leaves may take on golden tones before dropping. Structure becomes more visible as growth dies back.

Winter:
Deciduous. Woody stems remain as a structural framework. Prune in late spring if needed to tidy or reshape.

Wildlife & Garden Use

Wildlife:
Popular with bees and early-season pollinators. Dense growth provides nesting opportunities for small birds and cover for insects.

Garden Use:
Ideal for quickly covering large vertical structures such as fences, sheds, walls, trellises, arches, or mature trees. Perfect in cottage gardens, wildlife-friendly spaces, or informal settings where naturalistic growth is encouraged.

Companion Plants:
Pairs well with spring-flowering bulbs and shrubs such as Forsythia, Ribes, or Spiraea. Complements other clematis varieties with later bloom times for season-long interest. Underplant with shade-tolerant perennials like Geranium, Brunnera, or Heuchera to protect roots and add texture.

Don’t miss out on the exceptional quality of the Clematis montana Grandiflora. It’s just a few clicks away when you order online, or you can stop by your nearest Thompson's Branch to pick one up and chat with our knowledgeable team.