How to prune clematis 'jackmanii'

Late winter to early spring (February–March), before new growth begins. Cut every stem back to a pair of strong, healthy buds at 30–45 cm above soil level. Remove cut material completely. Feed and mulch after pruning. The plant will regrow vigorously from the base and flower on current-season shoots from midsummer onward.

Annually (hard cut every late winter). Clematis 'Jackmanii' is a Group 3 (hard pruning) clematis that flowers only on new season's growth. Cut all stems back hard to 30–45 cm (12–18 in) above ground in late winter. This keeps the plant tidy, prevents a bare base, and produces the strongest flowering stems each summer.

Cut every stem back to a pair of strong, healthy buds at 30–45 cm above soil level. Remove cut material completely. Feed and mulch after pruning. The plant will regrow vigorously from the base and flower on current-season shoots from midsummer onward.