How to Grow Clematis 'The President'
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Clematis 'The President'
Clematis × jackmanii 'The President'
vineClematis 'The President' is a large-flowered hybrid clematis renowned for its spectacular deep purple-magenta blooms with darker red stamens that can reach 6-8 inches in diameter. This deciduous to semi-evergreen vine is a prolific bloomer that flowers from early summer through fall, making it a showstopper for trellises, arbors, and garden structures. It is one of the most popular clematis varieties worldwide and relatively easy to grow compared to other large-flowered types.
When should you plant Clematis 'The President' in your zone?
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Example Clematis 'The President' timeline · Pittsburgh, PA (Zone 6b)
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Plant Clematis 'The President'
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Clematis 'The President'
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Clematis 'The President' dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in USDA zones 4-9; hardiest in zones 5-8
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Get my Clematis 'The President' timeline →Growth Stages
Establishment (Year 1)
8-12 monthsYoung vine with limited growth, sparse foliage, and few or no flowers as it focuses on root development
Keep soil consistently moist, provide sturdy support structure, avoid heavy fertilizing, and be patient—this is normal. Pinch back stems to encourage branching.
Vegetative Growth (Spring, Year 2+)
4-6 weeksVigorous new stems emerge in spring with heart-shaped leaves arranged alternately on climbing petioles; vine rapidly extends upward and outward
Tie and train new stems onto support structure. Provide balanced fertilizer (higher potassium). Remove any dead or damaged stems from winter. Ensure consistent watering.
Blooming Phase 1 (Early to Mid-Summer)
6-8 weeksFlower buds form on previous year's wood; large 6-8 inch flowers with deep purple-magenta petals and prominent reddish stamens open profusely
Deadhead spent flowers to encourage continuous blooming. Water deeply during dry spells. Apply bloom-boosting fertilizer (higher phosphorus). Avoid heavy pruning during this phase.
Summer Rebloom (Mid-Summer to Fall)
8-12 weeksSecond flush of blooms appears on new growth; flowers may be slightly smaller or lighter in color than spring blooms
Continue deadheading and deep watering. Fertilize every 3-4 weeks with balanced formula. Provide afternoon shade in extremely hot regions to preserve flower color.
Dormancy (Late Fall to Early Spring)
3-4 monthsFoliage yellows and drops; vine becomes bare. In zone 4-5, above-ground portions may die back completely; roots remain alive
Apply 2-3 inches of mulch around base in fall. Do not prune in fall. Allow the vine to rest. In early spring, remove mulch gradually and prune out dead wood.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Prune affected stems 12 inches below wilted area; destroy prunings. Ensure good air circulation and avoid overhead watering. Plant deep (crown 2 inches below soil) for resilience. Apply fungicide if severe.
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Increase humidity with regular misting. Spray with strong water spray to dislodge. Use neem oil or miticide if infestation is severe. Provide afternoon shade in hot, dry climates.
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Improve air circulation by judicious pruning. Spray with sulfur-based fungicide or baking soda solution (1 tbsp per gallon). Avoid overhead watering. Remove infected leaves.
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Hand-pick in early morning or evening. Apply copper tape or diatomaceous earth around base. Use beer traps or remove hiding debris nearby.
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(various fungi)
Ensure excellent drainage. Do not overwater. Remove affected stems. Improve air circulation. Repot in fresh soil if container-grown.
Uses
Cut flower arrangements
CraftLarge, showy blooms are excellent for fresh flower arrangements and last 5-7 days in water. Pair with complementary foliage and light flowers. [source]
Garden structure focal point
HouseholdPerfect for covering arbors, pergolas, trellises, fences, and garden walls. The profuse blooms create a stunning visual display that attracts attention and pollinators. [source]
Pollinator magnet
WildlifeAttracts bees, butterflies, and other beneficial insects with its abundant flowers and prominent stamens. Provides valuable nectar and pollen during summer and fall. [source]
Traditional herbal use
MedicinalClematis species have been used in traditional Chinese and Ayurvedic medicine, though 'The President' is primarily ornamental. Not recommended for internal consumption without expert guidance. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Clematis 'The President' is an ornamental vine grown for flowers, not harvest. Cut flowers can be enjoyed in arrangements—cut stems with multiple buds in the morning when fully turgid. Deadhead spent flowers throughout the season by pinching off flower heads just below the bloom to encourage continuous flowering. In late winter (February-March in most zones), perform dormant pruning: cut back all stems to 12-18 inches above ground level or to a sturdy pair of buds.
Fun Facts
- 🌱 Clematis 'The President' was introduced in 1876 and remains one of the most widely grown large-flowered clematis varieties over 145 years later, testament to its reliability and stunning appearance.
- 🌱 The flower's stamens are distinctly reddish or wine-colored, which gives it a jewel-like appearance—the stamens can actually be darker than the petals, creating a striking contrast.
- 🌱 Clematis is sometimes called 'Queen of the Vines' due to the spectacular size and color of its flowers; 'The President' exemplifies this title with its massive blooms and extended flowering season.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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