How to Grow Clematis 'Jackmanii'
Clematis × jackmanii
Your complete guide to growing Clematis 'Jackmanii'.
📷 Wikimedia CommonsWhen to Plant Clematis 'Jackmanii'
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | May – June | July – September | — |
| Zone 2 | April – May | June – August | — |
| Zone 3 | April – May | June – August | — |
| Zone 4 | March – April | June – July | — |
| Zone 5 | March – April | May – July | — |
| Zone 6 | March – April | May – July | — |
| Zone 7 | February – March | April – June | — |
| Zone 8 | February – March | April – June | — |
| Zone 9 | January – February | March – May | — |
| Zone 10 | January | February – April | — |
| Zone 11 | January | January – March | — |
| Zone 12 | January | January – March | — |
| Zone 13 | January | January – March | — |
Companion Plants for Clematis 'Jackmanii'
✓ Good companions
Thrives in partial shade created by clematis and helps cool root zone
Thrives in the partial shade created by clematis while providing attractive ground cover for root pr…
Evergreen structure provides year-round support and root shading
Deters aphids and ants while providing complementary purple-blue flowers
Keeps clematis roots cool and moist while deterring pests like aphids with its aromatic oils
Different bloom times extend flowering season and similar growing requirements make them compatible
Different bloom times extend flowering season and similar care requirements
Provides attractive foliage ground cover that keeps clematis roots cool and protected from sun
Low-growing groundcover that shades clematis roots and retains soil moisture
Can intertwine beautifully on same support structure with complementary bloom times and similar care…
Provides shade for clematis roots while allowing vine to climb above
Provides essential cool shade for clematis roots while thriving in the partial shade cast by the vin…
Repels aphids and spider mites that commonly attack clematis
Provides ground cover for clematis roots while both prefer well-drained soil and similar sun exposur…
Classic pairing where clematis can climb through roses, extending bloom season and sharing similar s…
Creates beautiful color combinations and both benefit from similar growing conditions
✗ Keep away from
Extremely invasive root system outcompetes clematis for nutrients and water while potentially damagi…
Releases juglone toxin that inhibits clematis growth and can cause wilting
Produces juglone toxin that can severely damage or kill clematis and most other garden plants
Shallow root system competes aggressively for water and nutrients
Invasive spreading can overwhelm clematis root system and compete for resources
Aggressive spreading nature competes heavily for nutrients and water, potentially overwhelming clema…
