In this video pruning tutorial, horticulturist Barbara Larson shows you how to prune multistem shrubs, like lilac, forsythia, shrub dogwoods, spirea vanhouttei and other spring blooming Spireas, Mockorange (Philadelphus), Viburnum, Physocarpus, and Deutzia. For more, or to get started pruning your own multistem shrubs, watch this video pruning tutorial.