vine

Kasugai Clematis

The Story

Plant Bio

Clematis x kasugai is known for its striking purple flowers that bloom profusely.

This cultivar is unique for its vibrant color and compact growth habit, making it a perfect choice for trellises and arbors.

Uses & Benefits:

Clematis x kasugai provides stunning vertical accents with its large, fragrant blooms, enhancing garden aesthetics.

Supports climbing on structures, saving space and creating privacy screens.

Attracts pollinators such as bees and hummingbirds, supporting local biodiversity.

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

Japan

Toxicity

Toxic to dogs, cats, and horses if ingested

Bloom period

Mid-summer – Late summer

In flower about 2 months of the year

Planting

How to Grow

Select a well-draining, fertile soil with a neutral to slightly alkaline pH.
Plant clematis x kasugai in a location that receives full sun to partial shade.
Tuck roots deeply and mulch around base to keep cool and retain moisture.
Water regularly, especially during dry spells, ensuring soil remains moist but not waterlogged.
Tie in new growth to a trellis or support for vertical growth.
Prune after flowering to promote healthy blooms and maintain shape.

Pro Tip

Plant in a protected spot with good air circulation to prevent diseases and ensure healthy flowering.

Keep It Thriving

Care Guide

Do

Water consistently, especially during hot, dry periods 💧
Mulch to conserve moisture and regulate soil temperature 🌱
Prune after flowering to encourage new growth
Support with a sturdy trellis or arbor
Feed with a balanced fertilizer in spring

Don't

Avoid overwatering, which can lead to root rot ❌
Don’t prune in late summer or fall—wait until after flowering
Avoid planting in overly shaded spots where blooms may be sparse
Don’t ignore pest signs or disease symptoms
Avoid heavy soil that retains too much water

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vigorous climbing vine for trellises and arborsDecorative focal point on walls or fencesColorful, fragrant blooms in garden borders

Companion Plants

Roses Lavender Daylilies Hostas Ferns

Multiply

Propagation Methods

Good to Know

Common Questions

Kasugai Clematis questions

What zones can Kasugai Clematis grow in?

Kasugai 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 Kasugai Clematis deer resistant?

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

When does Kasugai Clematis bloom?

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

Does Kasugai Clematis need full sun?

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