Before pruning, make a quick assessment of the plant to check its overall size and strength of growth.
In late winter, buds are beginning to emerge. Make sloping cuts above a pair of buds to ensure there are no unsightly ‘snags’, which die back, allowing diseases to enter. Reduce each stem to about 30cm above ground level.
Once shoots start to grow, carefully wind them around the plant support and tie in using twine. This will encourage the shoots to flower along the entire length of the stem. Otherwise, new shoots will race to the top of the support, providing only minimal coverage and with flowers only in the upper, high sections.