What is the best time of year to prune evergreen trees?
Generally, the best time of year to trim trees and shrubs is late winter; after the coldest freeze of the season has passed, but before the spring thaw. This is especially true for heavy trimming jobs, where a lot of the crown has to be removed, and for trees like pines, which tend to “bleed” (release a lot of sap).Estimated Reading Time: 6 mins.
Evergreen Trees An excellent time to prune spruce and fir is late winter when they are still dormant. Spruce and fir possess side or lateral buds. The pruning cut should be just above a side bud or branch. Pines are pruned in early June to early July when the new growth is in the 'candle' stage. Jul 03, When to Prune Evergreen Shrubs.

In general, prune needle-bearing evergreen shrubs in early spring, toward the end of dormancy and before the emergence of new growth. Pruning the evergreens at this time allows plenty of time for new growth to emerge, as well as plenty of time for these new shoots to harden off before the following winter.
Apr 06, Most evergreens are pruned either while dormant in early spring before new growth starts, just as new growth is starting, or when they are semi-dormant, in mid-summer. Early spring is preferable since the new growth will quickly fill in. The new growth on evergreens is referred to as"candles" because of the candle-like shape of the branch tips. Jun 26, prune evergreen tree electric trimmer.
Yews have flat, shiny needles and often have berries. To correct size or shape, prune in late winter. To create formal shapes, shear in spring after new growth has developed, and repeat in summer.