Q.I Want To Know How Long For Hackberry Tree To Crown Again.
I over pruned the hackberry tree in my backyard and my husband is really upset because it looks really bare now.

Certified GKH Gardening Expert
I don't see a photo so it is hard to know exactly what happened. You may have cut off most of the leaves with the branches, which the tree needs for photosynthesis. Another hazard is hat racking, or cutting off the top of the tree.
Hackberries grow quickly so that may help. If it has been topped, you may need to seek the advice of an arborist. Here is more:
https://www.gardeningknowhow.com/ornamental/trees/hackberry/hackberry-tree-information.htm
https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-topping-information.htm
https://www.gardeningknowhow.com/special/children/photosynthesis-for-kids.htm
Here is how to prune to create a strong structure: