Answer: Weeping cherries are grafted onto a trunk and the weeping part should send out lateral branches (somewhat like the ribs on an umbrella). Weeping branches are then produced on the laterals. As long as these lateral branches are intact, they should produce new stems which will hang down. If the branches are very thick, you'll just have to wait for new growth to appear. If the branches are still thin and pliable, you can tie some stones from the ends of the branches to weigh them down and encourage a weeping growth habit. (I use cotton string and make slings for the stones). Cherry trees will usually recover from poor pruning - time will tell if yours still has the ability to produce weeping branches. Hope so!
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