Species

Clematis x jackmaniiJackman Clematis

30 other cultivars

vine

Katharina clematis

Clematis x jackmanii 'Katharina'

The Story

Plant Bio

A member of the Viticella group, this is a deciduous, perennial climber with pinnately compound leaves. It is vigorous and generally resistant to clematis wilt.

Features abundant, nodding, violet-purple flowers, each with a contrasting reddish-purple central bar. Blooms profusely from mid-summer to early autumn. Known for its vigor and good resistance to clematis wilt.

Uses & Benefits:

A stunning climbing vine with large, fragrant flowers that add elegance to fences and trellises.

Provides natural shade and privacy in garden spaces.

Supports pollinators such as bees and butterflies.

SpeciesClematis x jackmaniiJackman Clematis

Essentials

At a Glance

Plant Type

Vine

Height

120 inches

Width

48 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Moderate

Humidity

Average

Lifespan

Decades

Native To

Southern Europe and Western Asia

Toxicity

Toxic to humans and pets if ingested.

Planting

How to Grow

Tuck young vines into a sturdy trellis or support structure.
Mist cuttings regularly to maintain humidity and promote rooting.
Water deeply once a week during dry periods for healthy growth.
Fertilize with a balanced fertilizer in early spring and mid-summer.
Prune after flowering to encourage vigorous new growth.
Mulch around the base to retain moisture and suppress weeds.

Pro Tip

Provide strong support early to prevent damage and encourage lush flowering.

Keep It Thriving

Care Guide

Do

Water consistently to keep soil moist but not waterlogged 🌱
Prune to shape and remove dead or weak stems
Feed with a balanced fertilizer in spring and summer
Mulch to conserve moisture and regulate soil temperature

Don't

Avoid overwatering, which can lead to root rot ❌
Don’t prune in late fall or winter
Refrain from neglecting support structures
Avoid fertilizing with high nitrogen late in the season

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Climbing vine on trellises for a fragrant floral displayDecorative cover for fences and arborsViney accent in cottage gardens

Companion Plants

Lavender Roses Hostas Daylilies Salvia

Multiply

Propagation Methods

Good to Know

Common Questions

Katharina clematis questions

What zones can Katharina clematis grow in?

Katharina 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 Katharina clematis deer resistant?

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

When does Katharina clematis bloom?

Katharina clematis typically blooms in mid-summer to early autumn through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Katharina clematis need full sun?

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