Whorled-branched conifers like the pine tree should be pruned in mid to late spring, and before the new needles become mature. Spruce trees require a late winter trimming, before the new growth begins.
About this Author
Callie Barber has been writing professionally since 2002. Barber's love for design and writing inspired her to create Design Your Revolution, a blog that shares creative and affordable ways to decorate indoor and outdoor living environments. Her articles have appeared on Travels.com and GardenGuides.com. Barber holds a Bachelors of Arts in international studies from the University of North Carolina.