How to Prune Jackman's clematis?
Pruning (clematis) Group 3

Jackman's clematis · Clematis 'Jackmanii'
Plant in a moisture-retentive, well-drained soil, with the roots and base of the plant kept cool and shaded by other plants or a layer of pebbles at the base. Plant with the crown 5-8cm (2-3in) deep to encourage new shoots to grow from below ground level. See clematis cultivation for more advice
Pruning (clematis) Group 3