Why do mushrooms grow again in the same place?

Mushrooms grow on dead matter - so you could have anything under the ground from a rotting tree root to thick thatch in your lawn. There are no products to control mushrooms.

If the mushrooms are growing in a straight line that leads to a tree...well that means the roots are rotting and your favorite tree isn't long for this world.

If you see a large group of them usually in a circle, that simply means there WAS a tree in that area and there are still some roots underground. If you see tiny ones scattered all over the lawn, then you have very thick thatch.