Answer: It isn't necessary to prune your weeping cherry tree. If you find a branch that's growing straight up or is otherwise misplaced, you can prune it off. Some gardeners like to prune the branches so they're even at the bottom, but I think it looks nicer when the branches are allowed to drape clear to the ground. If you do decide to prune, wait until after it has finished blossoming so you can enjoy the flower display. Your weeping cherry is grafted onto a rootstock. You'll find the graft (a swelling in the trunk) just below where the branches emerge. Anything that grows beneath the graft will not have the weeping characteristics, so rub out any buds you find growing along the trunk beneath the graft. Aside from the above, your tree won't need much maintenance except for regular watering and occasional feeding.
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