Species

Clematis x jackmaniiJackman Clematis

30 other cultivars

vine

John Warren Clematis

Clematis x jackmanii 'John Warren'

$29.99

The Story

Plant Bio

A vigorous vine with large, striking purple flowers.

Known for its hardy nature and prolific blooming.

Uses & Benefits:

A stunning climbing plant with vibrant, large flowers that add vertical interest and color to garden structures.

Provides natural privacy and shade when trained on fences or arbors.

Supports pollinators like bees and butterflies with its nectar-rich blooms.

SpeciesClematis x jackmaniiJackman Clematis

Essentials

At a Glance

Plant Type

Vine

Height

96 inches

Width

36 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

Garden origin

Toxicity

Toxic if ingested; can cause skin irritation.

Marketplace

Where to Buy

Spring Hill Nursery

Bareroot

In Stock$29.99

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

Tuck young vines into a sturdy trellis or support structure.
Mist cuttings regularly to maintain humidity and promote rooting.
Provide well-draining soil enriched with organic matter.
Water consistently, especially during dry spells, for healthy growth.
Prune after flowering to encourage vigorous blooming.
Mulch around the base to retain moisture and suppress weeds.

Pro Tip

Use a balanced fertilizer in early spring to boost flowering and growth.

Keep It Thriving

Care Guide

Do

Water regularly during dry periods 💧
Prune after flowering to shape and promote blooms
Provide support for climbing
Mulch to conserve moisture

Don't

Avoid overwatering to prevent root rot ❌
Don’t let the plant dry out completely
Avoid fertilizing late in the season
Don’t forget to prune

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Climbing vine on trellises and fencesDecorative cover for arborsVertical accent in garden

Companion Plants

Hostas Ferns Daylilies Lavender Sedum

Multiply

Propagation Methods

Good to Know

Common Questions

John Warren Clematis questions

What zones can John Warren Clematis grow in?

John Warren 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 John Warren Clematis deer resistant?

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

When does John Warren Clematis bloom?

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

Does John Warren Clematis need full sun?

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