Garden hybrid

Clematis x hybridaClematis

35 other cultivars

vine

Clematis Poseidon

Clematis x hybrida 'Poseidon'

The Story

Plant Bio

Clematis x hybrida 'Poseidon' is a vigorous climbing shrub known for its large, star-shaped blue flowers with prominent stamens, and its lush, green, trifoliate foliage that provides excellent coverage on supports.

This cultivar is prized for its abundant, early-flowering blooms and its ability to thrive in a range of soil types, making it an excellent choice for decorative trellises and fences.

Uses & Benefits:

Provides lush, flowering vertical accents that enhance garden aesthetics.

Supports climbing structures, saving ground space.

Attracts beneficial insects and pollinators.

SpeciesClematis x hybridaClematis

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

Cultivated hybrid

Toxicity

Toxic if ingested; can cause skin irritation

Planting

How to Grow

Tuck young plants into well-prepared soil in early spring.
Mist cuttings regularly to maintain humidity, taking 6 weeks to root.
Tie vines gently to support structures as they grow.
Water deeply during dry periods, especially in summer.
Fertilize with a balanced fertilizer in early spring and mid-summer.
Prune after flowering to encourage new growth.

Pro Tip

Provide sturdy support and keep roots cool with mulch for best flowering.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil moist 🌱
Prune after flowering to promote healthy growth
Use a trellis or arbor for support

Don't

Avoid letting roots dry out ❌
Don’t over-fertilize, which can reduce flowering
Avoid planting in overly shaded areas

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vertical garden with fragrant, purple flowersClimbing on trellises for decorative fences

Companion Plants

Hostas Ferns Daylilies Lavender Salvia

Multiply

Propagation Methods

Good to Know

Common Questions

Clematis Poseidon questions

What zones can Clematis Poseidon grow in?

Clematis Poseidon 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 Clematis Poseidon deer resistant?

Not reliably. Deer may browse Clematis Poseidon, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Clematis Poseidon bloom?

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

Does Clematis Poseidon need full sun?

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