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Clematis The President

Clematis Γ— jackmanii 'The President'

vine

The President is a large-flowered hybrid clematis known for its stunning 5-7 inch deep purple flowers with darker purple stamens that bloom prolifically from early summer through fall. This vigorous deciduous vine is one of the most popular clematis varieties for gardeners, offering repeat blooming and excellent ornamental value. It requires sturdy support and regular pruning to maintain shape and encourage continuous flowering.

Growing Conditions

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Sun: Full sun to partial shade; requires 6+ hours of direct sunlight daily for best flowering. Roots prefer cool, shaded conditions (mulch heavily)
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Water: Keep soil consistently moist but not waterlogged. Water deeply 1-2 times per week during growing season. Reduce watering in winter. Avoid overhead watering to prevent fungal issues
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Spacing: 36 inches
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Days to maturity: Flowers appear within first season from established plants; 2-3 years for mature vine
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Planting depth: Plant deep with bottom 2-3 leaf nodes buried below soil surface to encourage multiple stems from base

Soil

Type: Well-draining loamy soil, rich in organic matter
pH: 6.0-7.0
Amendments:
Compost aged manure perlite for drainage leaf mold

Growing Zones

Find your zone β†’

Zones 4-9; best performance in zones 5-8

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

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Growth Stages

1

Establishment (Spring - Early Summer Year 1)

4-6 weeks

Vine emerges with light green foliage and begins climbing. Early buds may form.

Install sturdy support structure immediately. Water regularly and deeply. Apply 3-4 inch mulch layer around base. Pinch back soft stems to encourage branching.

2

First Bloom (Early Summer)

4-6 weeks

Large purple flowers with prominent stamens appear along the developing vine. Blooms typically single-petaled.

Deadhead spent flowers to encourage more blooms. Monitor for aphids and spider mites. Maintain consistent moisture. Apply balanced fertilizer every 2-3 weeks.

3

Vegetative Growth (Mid-Summer)

6-8 weeks

Vine grows vigorously with darker green foliage. Some flowering continues but growth is prioritized.

Tie in new growth to support structure. Continue deadheading to stimulate blooming. Water during dry spells. Prune any diseased stems immediately.

4

Repeat Flowering (Late Summer - Fall)

6-10 weeks

Second and third flush of large purple flowers bloom prolifically. Plant reaches mature size by mid-fall.

Continue deadheading. Reduce nitrogen fertilizer; apply potassium to encourage flowers. Cut back old flowering stems by 1/3 to shape vine. Prepare for dormancy.

5

Dormancy (Winter)

3-4 months

Leaves drop completely. Vine appears brown and bare. Root system remains active under mulch.

Cut back stems to 12-24 inches in late winter/early spring before new growth emerges (Pruning Group 2). Clear away fallen leaves. Do not fertilize. Minimal watering needed.

Companion Planting

Plan your garden β†’

Plant with:

Roses honeysuckle clematis other varieties early-flowering perennials catmint lavender coreopsis salvia

Avoid planting near:

Black walnut trees (juglone toxicity) aggressive ground covers that compete for moisture other vines that tangle

Common Pests

  • Spray with water to dislodge; use insecticidal soap or neem oil if severe. Encourage beneficial insects like ladybugs.

  • Increase humidity with water misting. Apply neem oil or sulfur spray. Ensure adequate irrigation to reduce stress.

  • Remove affected stems immediately below infected area (6+ inches). Improve air circulation. Apply fungicide if widespread. Plant deeply to create backup buds.

  • and

    Remove by hand at night. Apply copper barriers or diatomaceous earth around base. Use slug baits sparingly if necessary.

  • Improve air circulation by pruning. Apply sulfur or potassium bicarbonate fungicide. Water at soil level, not foliage.

Uses

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Vertical garden display

Ornamental

The President creates a stunning vertical focal point with its large deep purple flowers covering trellises, pergolas, arbors, and walls. Perfect for creating living screens, softening hard architectural features, or adding romantic elegance to garden rooms. [source]

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Pollinator attraction

Wildlife

The prominent stamens and abundant flowers attract bees, butterflies, and other pollinators throughout the growing season. Provides nectar and pollen when many other plants have finished blooming. [source]

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Cut flowers and floral arrangements

Craft

The striking large purple blooms make excellent long-lasting cut flowers for fresh arrangements, adding dramatic color and texture to bouquets and centerpieces. [source]

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Privacy and screening

Household

When trained on sturdy lattice or fence panels, mature vines create dense foliage coverage that provides privacy from neighbors while maintaining visual interest year-round. [source]

Harvest Tips

Clematis is ornamental and not harvested in traditional sense. Deadhead spent flowers regularly throughout blooming season to encourage continuous flowering. Cut flowers can be brought indoors and will last 5-7 days in water if cut in early morning. In late winter/early spring before bud break, prune back to 12-24 inches above ground level to maintain shape and promote dense, abundant flowering.

Fun Facts

  • 🌱 The President blooms on both old wood (from previous year) and new wood (current season), making it extremely prolific and forgivingβ€”it flowers even if winter pruning is missed
  • 🌱 Despite being a vigorous grower, The President is actually a hybrid cross developed in England in 1876 and remains one of the most reliable large-flowered clematis varieties for home gardeners worldwide
  • 🌱 The deep purple color can intensify in cooler climates and at the start of the season, while flowers may fade slightly lighter if exposed to intense summer heat

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