I have a Modesto Ash and an Arizona Ahe tree (about 20' tall). I haven't a clue how or when to prune them. I also would like to know how and when to prune the Japanese Privot trees.
Certified GKH Gardening Expert
This animated guide from the Arbor Day Foundation should be helpful for you. https://www.arborday.org/trees/pruning/
Really, most trees are pruned about the same. Remove any diseased or broken branches. Remove branches that are rubbing against others or are growing too close to others and then trim as you see fit to shape the tree.