Clematis 'Jackmanii Superba' is a vigorous climbing vine known for its profuse velvety deep purple blooms that appear from mid to late summer. It is one of the most popular and reliable large flowered clematis cultivars, often blooming on both old and new wood when properly pruned. With its showy color and vertical growth habit, this cultivar adds dramatic height and floral impact to trellises, fences, and arbors.
Height & Spread: 8 - 12 ft x 3 - 6 ft
Bloom Time: Mid to late summer
Light Requirements: Full sun to part shade (roots prefer cool shade)
Soil Preference: Moist, well drained soil rich in organic matter
Watering Needs: Moderate; keep evenly moist but not soggy
Deer Resistance: Generally deer resistant once established
Native Status
This cultivar originates from Clematis jackmanii, a hybrid species developed in England. It is not native to North America but is widely adapted to temperate garden conditions.
WILDLIFE & INSECTS
Bees
- Attracts bumblebees and other long tongued bees that forage for pollen deep within the wide blooms.
Butterflies
- Visited by Monarchs, Swallowtails, and Painted Ladies seeking nectar from the showy blooms.
Birds
- Provides vertical cover and perching opportunities for small birds like wrens and finches.
Beneficial Insects
- Supports lacewings and hoverflies which use its structure as shelter while preying on garden pests.
Spacing & Landscape Use
Spacing Recommendations:
- Allow 36 - 48 in spacing when planting near supports; ensure vertical structure for climbing.
Landscape Placement:
- Ideal for trellises, fences, pergolas, and arbors where vertical growth and large floral displays are desired.
Companion Plants
- Hydrangea paniculata 'Little Lime' - Compact habit and soft green white panicles complement the rich purple blooms and fill in lower garden space.
- Coreopsis verticillata 'Moonbeam' - Lacy foliage and pale yellow daisy blooms offer a soft contrast at the clematis base.
- Nepeta faassenii 'Walker’s Low' - Mounding gray green foliage and lavender blue blooms offer a soft sprawling ground layer beneath clematis vines.
- Salvia nemorosa 'Caradonna' - Deep violet flower spikes echo the purple tones and attract pollinators throughout the summer.
- Heuchera 'Plum Pudding' - Rich plum colored foliage intensifies the surrounding color scheme while providing excellent texture contrast.