Answer: Kerria japonica is a deciduous shrub growing to 8' tall with a 5'-6' spread. To keep the plant performing well, prune heavily after bloom, cutting out branches that have flowered, plus all dead or weak wood. New stems and branches will grow from the crown of the plant, and some of the branches remaining after pruning will produce laterals (or side-shoots). The green branches are often cut for flower arrangements. There's not much you can do to Kerria that it can't overcome, so don't be afraid to prune during the summer months.
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