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How to Grow Hagley Hybrid Clematis

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Hagley Hybrid Clematis

Clematis × jackmanii 'Hagley Hybrid'

vine

Hagley Hybrid is a deciduous flowering clematis vine prized for its large, magenta-pink flowers with deep red centers that bloom prolifically throughout the summer and early fall. This vigorous cultivar is a hybrid between Clematis jackmanii and Clematis lanuginosa, combining the best traits of both parents. It's ideal for trellises, arbors, and garden structures, providing stunning vertical color in temperate gardens.

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Example Hagley Hybrid Clematis timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Hagley Hybrid Clematis

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Hagley Hybrid Clematis

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Hagley Hybrid Clematis dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun to partial shade; prefers 6+ hours of direct sunlight daily for best blooming, with afternoon shade in hot climates
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Water: Keep soil consistently moist but not waterlogged during growing season; water deeply 1-2 times weekly, more frequently during hot, dry spells; mulch to maintain soil moisture and keep roots cool
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Spacing: 36-48 inches from other plants; single vine plant inches
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Days to maturity: Flowers appear in second year; reaches full vigor by year 3-4
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Planting depth: Plant so the base is 2-3 inches below soil surface to encourage new shoots from below ground if frost damages upper growth

Soil

Type: Well-draining loamy to slightly clayey soil
pH: 6.5-7.5
Amendments:
compost aged manure perlite or coarse sand for drainage lime if soil is acidic

Growing Zones

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Thrives in USDA zones 4-9; performs exceptionally well in zones 5-8

4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a

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Growth Stages

1

Establishment

First growing season (spring through fall)

Young vine with tender growth, 6-12 inches tall, developing root system

Keep consistently moist; provide sturdy support structure; mulch heavily; avoid fertilizer in first season

2

Vegetative Growth

Spring through early summer, year 2 onward

Vigorous vine growth with twining stems, developing leaves on new growth; 3-6 feet of new growth annually

Train stems onto support structure; water deeply and regularly; light pruning to direct growth; apply balanced fertilizer monthly during growing season

3

Flowering

June through September (8-12 weeks of heavy flowering)

Abundant large magenta-pink flowers (4-6 inches across) with deep reddish-purple centers and prominent stamens; flowers appear on new wood

Prune hard in late winter/early spring to 12-24 inches above ground to maximize blooms; deadhead spent flowers to encourage continuous blooming; maintain consistent moisture

4

Secondary Flush

August through first frost

Second wave of flowers after summer heat subsides; fewer but still abundant blooms in cooler fall weather

Continue deadheading; reduce watering slightly if rainfall adequate; light fertilizing (low nitrogen) encourages blooms over foliage

5

Dormancy

November through March

Deciduous foliage drops; plant appears bare but retains woody vine structure; seed heads may develop if flowers not deadheaded

Perform hard pruning in late February or March before budbreak; no watering needed; protect vines from harsh winter wind if possible

Companion Planting

Plan your garden →

Plant with:

climbing roses honeysuckle lavender catmint salvia perovskia agapanthus coreopsis

Avoid planting near:

black walnut dense shade-casting trees aggressive vines like wild clematis

Common Pests

  • Remove affected stems immediately and destroy; improve air circulation; avoid wounding stems; plant deeply so new growth emerges from below ground if main stem dies back

  • Increase humidity with misting or spraying; strong water spray to dislodge mites; neem oil or insecticidal soap in persistent cases

  • Ensure good air circulation; avoid overhead watering; spray with sulfur or potassium bicarbonate fungicide; remove severely affected leaves

  • and

    Remove mulch slightly from base of plant; handpick at dusk; use copper tape or slug barriers; beer traps or diatomaceous earth

  • Strong water spray to dislodge; insecticidal soap; neem oil; encourage beneficial insects like ladybugs

Uses

🏠

Garden Ornament & Vertical Screening

Household

Hagley Hybrid is primarily grown as a landscape specimen for its stunning magenta-pink flowers that cover trellises, arbors, fences, and pergolas throughout summer. Its vigorous growth habit makes it excellent for creating living screens and adding height to garden spaces. [source]

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Cut Flower Arrangements

Craft

The large, showy flowers are excellent for fresh cut flower arrangements and floral designs. Harvest blooms in early morning for longest vase life, and they pair beautifully with other summer perennials and shrub flowers. [source]

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Pollinator Support

Wildlife

The prominent stamens and abundant flowering attract bees, butterflies, and other pollinators throughout the long blooming season. This vigorous vine provides nectar and pollen resources when many other plants have finished flowering. [source]

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Shade & Privacy Structure

Household

When grown on pergolas or shade structures, Hagley Hybrid creates dappled shade while maintaining an open, airy feel compared to solid screening. The deciduous nature allows winter light penetration while providing summer coverage. [source]

Harvest Tips

This is an ornamental flowering vine rather than a harvest plant. Deadhead spent blooms to encourage continuous flowering throughout the season. If seed heads form and you wish to keep them for fall interest, allow them to mature (silky, feathery seed heads appear in late summer). Cut flowers can be harvested for arrangements in early morning when hydrated.

Fun Facts

  • 🌱 Hagley Hybrid is a cultivar of the Group 3 Clematis, meaning it flowers on new wood and should be pruned hard each late winter—the harder you prune, the better it performs
  • 🌱 The deep red center of the magenta-pink flowers contrasts dramatically with the lighter colored petals, a characteristic that makes this cultivar distinctive among clematis varieties
  • 🌱 Clematis vines climb using petioles (leaf stalks) that twine around supports, not by tendrils or aerial rootlets, so they require something narrow enough to wrap around—ideally less than 1 inch in diameter

Gardening Terms

New to gardening? Learn about terms used in this guide:

Annual Cultivar Deadhead Full Sun Hybrid Mulch Partial Shade Trellis
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