An example of how allowing new shoots to grow at the margins of a pruning cut help it heal over quicker. Ideally large cuts like this would never have to be made, but sometimes we don’t get around to pruning when we should. You can see the side that has the new shoots is healing over much quicker than the other side without any growth. This is on a large apple tree. After a few years the shoots are usually thinned to one or two of the strongest.