Here are some other pruning tips offered by Michigan State University MSU Extension.
Aug 10, Probably the best time from the standpoint of the health of a plant is to prune in late winter or early spring just before new growth resumes for the year. However, there are exceptions depending on when a plant flowers or other characteristics (such as sap “bleeding” on maples) that may require pruning at other times of the stumpcut.barted Reading Time: 5 mins.
May 28, Avoid heavy, late summer pruning; too much pruning at this time will encourage new growth that may not harden off in time for winter. For those plants that don’t tolerate shearing well, like red or green twig dogwoods, it is best to prune them back to the ground when they become too large or sparse, and let them start over again by growing new limbs from the base.
Oct 20, If your pine, juniper, spruce, hemlock or fir needs pruning, early summer is the best time. The best time to prune yews and arborvitae is July, when the new growth is fully stumpcut.barted Reading Time: 4 mins.
Evergreen Shrubs. Prune evergreen shrubs, such as juniper and yew, in late March or early April before new growth begins. Light pruning may also be done in mid-summer. Avoid pruning evergreen shrubs in the fall. Fall pruned evergreens are more susceptible to winter injury. Deciduous TreesMissing: michigan.
Aug 20, When to Prune, by Tree Type. Deciduous.
When trimming evergreens is necessary, the best time to prune conifers is winter or very early spring when they are dormant and before growth begins.
These are the trees which shed their leaves each year. Most deciduous trees should be pruned in late fall to winter, according to the Young Trees. Subtropic. Flowering Trees. New Trees. Estimated Reading Time: 6 mins.