Originally Posted by rte4st8 
spent a summer planting about 2000 trees at
ISU. Not fun after the first 2 or 3. You are right on for the hole. I also was taught right or wrong to make a burm around the tree and put a bag of mulch in it to hold in water.
I remember in one of my hort classes at
ISU they would put pics of the "volcano" mulch pile around
ISU trees as an example of what not to do. Hole size is right on though.
They also were not a fan of fertilizer tree spikes.
