Clematis jackmanii 'Colossal Blooms'
vine

Clematis jackmanii 'Colossal Blooms'

Jackman's Clematis

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Vine

Height

144 inches

Width

36 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Moderate

Humidity

Moderate

Lifespan

Perennial

Native To

Cultivated hybrid

Toxicity

Toxic to pets and humans if ingested; can cause skin irritation

The Story

Plant Bio

Large, showy flowers with a stunning purple color. Notable for its massive blooms that can reach up to 7-10 inches across.

Bloom Period:

J
F
M
A
M
J
J
A
S
O
N
D
EarlyLate

Uses & Benefits:

Ornamental UsesVivid, large purple blooms create striking vertical accents in gardens and landscapes.
Practical UsesClimbs on structures, saving space and providing shade or privacy screens.
Ecological BenefitsSupports pollinators like bees and butterflies with nectar-rich flowers.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

  1. Tuck young vines near a sturdy trellis or fence for support.
  2. Mist cuttings regularly to maintain humidity and encourage rooting.
  3. Water consistently, keeping soil moist but not waterlogged.
  4. Apply a balanced fertilizer in early spring to promote healthy growth.
  5. Prune after flowering to shape the vine and remove dead stems.
  6. Mulch around the base to retain moisture and suppress weeds.

Pro Tip

Plant in well-drained soil with plenty of sunlight for abundant blooms.

Keep It Thriving

Care Guide

Do

  • Provide full sun for optimal flowering 🌞
  • Water regularly during dry spells 💧
  • Prune after flowering to maintain shape ✂️
  • Mulch to conserve moisture and control weeds 🌱
  • Support with a sturdy trellis or arbor

Don't

  • Avoid overwatering to prevent root rot ❌
  • Don’t prune in late fall or winter ❌
  • Never let the soil dry out completely ❌
  • Avoid heavy fertilization with high nitrogen ❌
  • Don’t forget to support the vines

Seasonal Care Calendar

TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deadhead
Fertilize
Mulch
Plant
Prune
Stake

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vigorous flowering vine for arbors and fencesColorful backdrop for garden bedsClimbing accent on walls or pergolas

Companion Plants

Hostas Daylilies Lavender Salvia Roses

Multiply

Propagation Methods

Good to Know

Common Questions