Q.weeping cherry tree
Bought a weeping cherry last spring. After all blossoms fell, nothing ever came back. Did not have any blooms this spring. Fertilized tree in early spring. See attached photo. Tree is still alive. Broke a twig and it is still green but no flowers.

There are a few reasons your weeping cherry may not be blooming this spring. It often takes a couple of years for a newly planted tree to become established and during this period there may not be blooms. Secondly, mother nature may be to blame and your flower buds may have been nipped by winter damage, or damage from a late frost.
For more information on weeping cherry trees, please visit the following link:
https://www.gardeningknowhow.com/ornamental/trees/weeping-cherry/weeping-cherry-growing-tips.htm