31 named cultivars

vine

Jackman Clematis

Clematis x jackmanii

The Story

Plant Bio

A vigorous, deciduous, twining vine prized for its profusion of large, 4-petaled, velvety deep purple flowers from summer to fall. A Group 3 clematis, it blooms on new growth and requires hard pruning in late winter. Ideal for covering walls, trellises, fences, or arbors.

One of the most popular and widely grown clematis hybrids, 'Jackmanii' is celebrated for its free-flowering nature, producing a spectacular display of 4-6 inch wide, deep purple flowers with contrasting greenish-white stamens. It is a very reliable and robust performer.

Uses & Benefits:

A stunning flowering climber that graces walls and trellises with vibrant purple blooms.

Provides natural privacy and shade in garden spaces.

Supports pollinators like bees and butterflies during blooming season.

Essentials

At a Glance

Plant Type

Vine

Height

120 inches

Width

36 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Moderate

Humidity

Moderate

Lifespan

Perennial

Native To

Garden Origin

Toxicity

Toxic to humans and pets if ingested, can cause skin irritation.

Planting

How to Grow

Tuck young vines into a sturdy trellis or support structure.
Mist cuttings regularly to maintain humidity during propagation.
Plant in well-drained soil enriched with organic compost.
Water deeply once a week, especially during dry spells.
Apply a balanced fertilizer in early spring for vigorous growth.
Prune after flowering to promote bushier growth and better blooms.

Pro Tip

Provide strong support early to prevent damage and encourage vertical growth.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil moist but not waterlogged 🌱
Prune in late winter to shape the plant and remove dead stems
Feed with a balanced fertilizer during the growing season
Mulch around the base to retain moisture and suppress weeds

Don't

Avoid overwatering, which can cause root rot ❌
Don’t prune in late summer as it may reduce blooms ❌
Never let the plant dry out completely during active growth
Avoid planting in poorly drained soil

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Fertilize
Mulch
Plant
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vigorous flowering climber on pergolasDecorative cover for fences and wallsElegant addition to garden trellises

Companion Plants

Roses Lavender Hostas Daylilies Salvia

Multiply

Propagation Methods

Good to Know

Common Questions

Jackman Clematis questions

What zones can Jackman Clematis grow in?

Jackman Clematis is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Jackman Clematis deer resistant?

Yes — Jackman Clematis is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Jackman Clematis bloom?

Jackman Clematis typically blooms in summer to fall through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Jackman Clematis need full sun?

Jackman Clematis does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.