Clematis ‘Jackmanii’ is a well-known climbing vine valued for its deep violet-purple flowers and reliable growth. This variety produces large, velvety blooms throughout the warm season and adapts well to trellises, fences, pergolas, and garden structures. Suitable for temperate to warm climates, it establishes a strong framework of stems and provides consistent seasonal colour. Grown from Non-GMO seeds, this cultivar performs well in both home gardens and landscape settings.

Key Features

• Non-GMO climbing flower variety

• Large violet-purple blooms

• Long flowering season in suitable climates

• Suitable for trellises, fences, and pergolas

• Adaptable to containers and garden beds

• Hardy perennial vine in many regions

• Supports pollinator activity

• Moderate growth rate with manageable maintenance

Specifications

• Botanical Name: Clematis ‘Jackmanii’

• Plant Type: Perennial climbing vine

• Seed Type: Non-GMO

• Growth Habit: Twining climber

• Flower Colour: Violet-purple

• Sun Requirements: Full sun to partial shade

• Mature Height: 2–4 m depending on support

• USDA Zones: 4–9 (approximate)

• Bloom Season: Late spring to early autumn

• Soil Needs: Well-drained, fertile soil

Planting Guide

• Seed Preparation: Soak seeds in room-temperature water for 12 hours. Some seeds may benefit from cold stratification for improved germination.

• Sowing Depth: Cover lightly—around 0.5–1 cm deep.

• Germination Temperature: 18–22°C.

• Germination Time: 3–6 weeks; some seeds may take longer due to natural dormancy.

• Watering: Keep the soil evenly moist but not waterlogged.

• Transplanting: Move seedlings outdoors once they are strong enough and frost conditions have passed.

• Support: Provide a trellis, fence, or vertical structure for climbing.

• Ongoing Care: Keep roots shaded or mulched while ensuring top growth receives adequate sunlight.