Q.Removing Dead Tree and Replanting New One
I heard that if you remove a dead tree it is not a good idea to plant another one in the same spot. Is there a certain time frame for doing this? What are the consequences if we plant immediately in the same spot as dead tree?

Certified GKH Gardening Expert
The reason it is not considered a good idea is because normally a tree dies from a disease and the next tree can be killed by the same disease. Plus, the weakened root system, which tends to live beyond the top of the tree, can attract disease.
If you feel the tree that was there before was disease free and died of other causes, you should be ok planting a new tree there.