Q.Dying weeping cherry
Planted a weeping cherry about 4 weeks ago. It started to die, as it was too wet. We dug it out and took the water out of the hole and replaced it with dry soil. Then replanted it. What should we do to save it, or will it die?

When you replanted it, was there evidence of root rot? If not, the chances of recovery are better. For information on root rot, please visit the following article: https://www.gardeningknowhow.com/plant-problems/disease/root-rot-in-garden-plants.htm
The best thing you can do to ensure your tree's survival is to care for it according to this article's guidelines: https://www.gardeningknowhow.com/ornamental/trees/weeping-cherry/weeping-cherry-growing-tips.htm