Pruning Trees and Shrubs. Rick Abrahamson University of Minnesota Extension Clay County. When should trees and shrubs be pruned?. January - February. Oak Oak Wilt Elm Dutch Elm Disease. March. Oak Ash Ash borer Birch Bronze Birch borer. Fireblight control Apple/crabapple
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University of Minnesota Extension
Shade and ornamental trees
PoplarEarly April (1st – 15th)
Early April (1st – 15th)
YewLate April (15th – 30th)
Japanese Tree Lilac
Shrub RoseMay - June
That’s good information, but… How should trees and shrubs be pruned?
Pruning equipment shrubs be pruned?
Grow your plants by choice, not by chance.
Weak crotch left on
Pruned up to high to soon
Open spreading form
Prune to a central leader
Future lies in your hand and your head!!!
Discipline: “Training which corrects, molds, strengthens, or perfects”
Low hedge (1-3’) shrubs be pruned?
Medium hedge (3-6’)
Large hedge (>6’)
Rocky Mountain Juniper
Black Hills Spruce
Colorado SpruceBuilding a hedge