It's best to prune them when blooming has finished, from mid-summer to early fall for deciduous species or before flower buds appear in spring for the evergreen Magnolias. With a history that ...

Pruning lilacs too far down may prevent the flowers from developing. Prune magnolias sparingly. Since magnolia develops flowers on old wood, prune it right after it blooms, which usually happens ...

Pruning also causes a hormone signal that triggers ... Exceptions include spring-flowering shrubs and trees — like Japanese magnolias, azaleas and bigleaf hydrangeas — that set flower buds ...