Clematis—300+ species and countless cultivars—offers unmatched diversity: flowers 1-10 inches, singles/doubles, bells/stars/tulips, in every color, blooming spring through fall. With proper planting and pruning, these "queens of climbers" grace gardens for decades.
Bloom Groups = Pruning Groups
| Group | Bloom Time | Blooms On | Prune | Examples |
| 1: Early | April-May | Old wood | After bloom (by July) | C. alpina, montana, armandii |
| 2: Repeat | May-June + Sept | Old + new wood | Light (Feb/Mar): trim tips | 'Nelly Moser', 'Henryi', 'The President' |
| 3: Late | July-frost | New wood | Hard (Feb/Mar): 2-3 ft | C. viticella, tangutica, jackmanii |
Planting for Success
- Sun: Tops in sun (6+ hours); roots cool/shaded.
- Soil: Fertile, well-drained, neutral pH. Amend with compost, peat, manure.
- Depth: Plant 2-3 inches DEEPER than pot level—bury first set of nodes. This encourages basal shoots and protects from clematis wilt.
- Support: Thin trellis/wires at planting—climb by twining leaf petioles.
- Water: Consistent moisture first year; mulch heavily.
- Root competition: Avoid aggressive tree/shrub roots nearby.
Ongoing Care
- Fertilize: 3:1:2 or 4:1:2 ratio annually before bloom. After 5-6 years, compost suffices.
- Training: Guide young vines; distribute shoots evenly.
- Winter: Mulch root zone; remove in early spring.
Common Problems
- Clematis Wilt: Sudden stem collapse. Plant deep; remove affected stems; improve drainage.
- Pests: Aphids, earwigs, slugs. Monitor; treat early.
- Mildew: Good air circulation; avoid wet foliage.
Design Ideas
- Mix Groups 1, 2, 3 on same support for 6-month bloom.
- Grow through shrubs/roses for "two plants, one space."
- Container culture: Large pot, good drainage, compact varieties.
Invest in proper planting and group-appropriate pruning, and clematis will reign over your vertical spaces for generations.
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