Topping/pruning leyland cypress
The builder of my house put in a row of Leyland Cypress trees about 5' from a fence, with about 5 feet between each tree (as a privacy hedge) - bad choice, of course. The trees are growing fast (as you would expect) and I wanted to see if I could maintain then as a hedge around 12' or so in height. This obviously requires topping them.
If I did this, would the tops ever grow back? The trees are around 13' or so now and I will be cutting back into old wood. Also, if I cut too deep, can I fashion one of the branches near the top into a leader and have it grow into another top, or is the tree marred for life?