Buddleja ‘Buzz’ plants are fully hardy and are pruned in the same way as larger Buddleja plants. You simply remove any dead, damaged or diseased wood and then prune all the stems back to form a low framework. Make sure you always cut to just above a pair of leaves. In future years shorten the previous year’s growth to 2 pairs of buds from this permanent framework. Read our step-by-step guide to pruning your Buddleja ‘Buzz' here.