How to Grow Alpine Clematis 'Pamela Jackman'
Wikimedia Commons
Alpine Clematis 'Pamela Jackman'
Clematis alpina 'Pamela Jackman'
vineClematis alpina 'Pamela Jackman' is a deciduous climbing vine prized for its vibrant semi-double deep purple-red flowers that appear in spring. This cultivar is more compact and manageable than many clematis varieties, making it ideal for smaller gardens and containers. It blooms prolifically and requires minimal pruning compared to other clematis groups.
When should you plant Alpine Clematis 'Pamela Jackman' in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Alpine Clematis 'Pamela Jackman' timeline · Pittsburgh, PA (Zone 6b)
-
Plant Alpine Clematis 'Pamela Jackman'
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Alpine Clematis 'Pamela Jackman'
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Alpine Clematis 'Pamela Jackman' dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-8, extremely cold-hardy
Sign up free to see if Alpine Clematis 'Pamela Jackman' grows in your zone — and get a personalized planting timeline.
Get my Alpine Clematis 'Pamela Jackman' timeline →Growth Stages
Establishment (Year 1)
First 12 monthsYoung vine develops root system and initial growth; may produce limited flowers
Water regularly, provide sturdy support structure, apply 2-3 inches of mulch around base keeping it away from stem. Do not fertilize heavily in first year.
Vegetative Growth (Early Spring)
3-4 weeksNew foliage emerges as temperatures warm; vine produces vigorous growth with feathery, fern-like leaves
Provide trellis or support as vine climbs. Apply balanced fertilizer as growth begins. Remove any dead wood from winter.
Flowering (Spring)
4-6 weeks (typically April-May)Abundant semi-double flowers with 6-8 petals open along the vine; deep purple-red coloring with prominent stamens
Maintain consistent moisture without waterlogging. Deadhead spent flowers to encourage extended blooming. Minimal pruning needed during this stage.
Secondary Blooming (Early Summer)
2-3 weeksA lighter flush of flowers may appear on new growth in early summer
Continue regular watering. Light feeding with low-nitrogen fertilizer can encourage reblooming. Remove seed heads if deadheading.
Dormancy (Winter)
4-5 monthsVine goes completely deciduous; foliage drops and vine appears bare
Reduce watering significantly. Protect base with heavy mulch (4-6 inches). Do not prune except to remove broken or diseased wood. Vines are extremely hardy.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Remove affected stems immediately and disinfect tools. Improve air circulation. Plant deeply to allow recovery from basal shoots. Ensure proper drainage and avoid overwatering.
-
Spray with sulfur fungicide or neem oil at first sign. Increase air circulation around vine. Avoid overhead watering. Remove heavily affected leaves.
-
Spray foliage with water to dislodge. Apply neem oil or insecticidal soap. Maintain adequate humidity. Monitor undersides of leaves.
-
and
Hand-pick in early morning or evening. Apply copper tape around support structure. Use diatomaceous earth around base. Reduce moisture in afternoon.
-
Remove flowers showing petal damage. Trap with rolled newspaper or straw. Encourage beneficial insects like ladybugs. Rarely requires chemical control.
Uses
Spring flowering vine
OrnamentalClematis alpina 'Pamela Jackman' provides stunning deep purple-red semi-double flowers in spring, making it perfect for covering trellises, pergolas, arbors, and fence lines. Its compact habit suits small gardens and container growing. [source]
Cut flower arrangements
HouseholdThe long-stemmed flowers with their distinctive semi-double form make excellent additions to spring flower arrangements and floral designs. [source]
Pollinator support
WildlifeThe abundant spring flowers attract bees, butterflies, and other pollinators. The feathery seed heads that follow provide winter interest and food for birds. [source]
Seed head crafts
CraftAfter flowering, the distinctive feathery seed heads (achenes) can be dried and used in dried flower arrangements and wreaths for lasting visual interest. [source]
Harvest Tips
Not typically harvested. Enjoy flowers on the vine or cut stems for indoor arrangements when flowers are fully open but still firm. Cut in early morning. Deadhead spent flowers to encourage extended blooming and prevent excessive seed production.
Fun Facts
- 🌱 'Pamela Jackman' was introduced by Jackman Nurseries in England in 1990 and is named after a member of the famous Jackman family, pioneers in clematis hybridization for over 150 years.
- 🌱 Clematis alpina belongs to Group 1 clematis (spring-flowering group), requiring minimal pruning—just remove dead wood and lightly trim after flowering, unlike other groups that need hard pruning.
- 🌱 This cultivar is exceptionally cold-hardy and can survive temperatures down to -30°F (-34°C), making it one of the best clematis choices for northern gardens and alpine regions.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Alpine Clematis 'Pamela Jackman' planting timeline
Tell us your zip code and we'll calculate exactly when to start Alpine Clematis 'Pamela Jackman' seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Alpine Clematis 'Pamela Jackman' timeline →