They are listed here from those requiring the least work, to the most work. An all over trim in spring or summer: This is only really appropriate for some smaller formal trees, especially evergreens.
If your plants flower from July - October and are deciduous, then you can prune these plants in spring. Food reserves from the roots will soon send out new shoots which then tend to flower at the ends ...
Every year each master gardener volunteer takes his / her turn working the booth to help the public by answering questions and sharing knowledge about gardening and horticulture. This year as I took ...