How to prune clematis 'bill mackenzie'

Late winter to early spring (February–March). Cut all stems back hard to 30–60 cm (12–24 in) above ground, retaining one or two buds per stem. This cultivar is extremely vigorous — if space allows, you can reduce to 90 cm for a taller framework, but the standard Group 3 cut is most reliable.

Annually, every late winter. Yes — 'Bill MacKenzie' is a vigorous Group 3 tangutica-type clematis that blooms on new wood from midsummer into autumn. Annual hard pruning is essential to prevent it overwhelming its support and to keep flowering within reach. Cut all stems back to 30–60 cm in late winter. On established plants in large spaces, a lighter tidy suffices.

Cut all stems back hard to 30–60 cm (12–24 in) above ground, retaining one or two buds per stem. This cultivar is extremely vigorous — if space allows, you can reduce to 90 cm for a taller framework, but the standard Group 3 cut is most reliable.