Clematis 'Colossal Blooms'
Clematis jackmanii 'Colossal Blooms'
Not currently listed at our partner nurseries.
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:
Uses & Benefits:
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
- Tuck young vines near a sturdy trellis or fence for support.
- Mist cuttings regularly to maintain humidity and encourage rooting.
- Water consistently, keeping soil moist but not waterlogged.
- Apply a balanced fertilizer in early spring to promote healthy growth.
- Prune after flowering to shape the vine and remove dead stems.
- 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
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Fertilize | ||||||||||||
| Mulch | ||||||||||||
| Plant | ||||||||||||
| Prune | ||||||||||||
| Stake |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Clematis 'Colossal Blooms' questions
What zones can Clematis 'Colossal Blooms' grow in?
Clematis 'Colossal Blooms' is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Clematis 'Colossal Blooms' deer resistant?
Yes — Clematis 'Colossal Blooms' is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Clematis 'Colossal Blooms' bloom?
Clematis 'Colossal Blooms' 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 Clematis 'Colossal Blooms' need full sun?
Clematis 'Colossal Blooms' does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Clematis to compare
Tie Dye Clematis
Clematis viticella 'Tie Dye'
Dr. Ruppel Clematis
Clematis x jackmanii 'Dr Ruppel'
Burning Love Clematis
Clematis x cartmanii 'Burning Love'
Yuan Clematis
Clematis viticella 'Yuan'
Tsukiko Clematis
Clematis x durandii 'Tsukiko'
Viva Polonia Clematis
Clematis x hybrida 'Viva Polonia'
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Clematis 'Colossal Blooms' with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
