Oaks are an exception.

If your trees and shrubs flower before the end of June, prune them immediately after flowering.

Watch for excessive running sap.

Flower buds develop during the previous season’s growth, so the flowers that bloomed this year developed last year and overwintered in the bud. If you prune before spring flowering, you also remove the flower buds and will eliminate the flowering for that bushmulch.bar Size: 1MB.

When to prune In general, the best time to prune trees and shrubs is during the dormant season. Major pruning, in which more than 15 percent of when to trim ornamental trees top of a plant is removed, is best left until early spring (February or March). Aug 20, Flowering Trees. They should be pruned after blooming, according to the Pacific Northwest Chapter of the International Society of Arboriculture.

Routine pruning of dead or dying branches can be done at any time. However, your type of tree can have specific needs and rules for trimming. New Trees. Inspect for pruning needs bushmulch.barted Reading Time: 6 mins.

Late February to early April is the best time to prune fruit trees in Iowa.

Good for major clean-out and thinning. Fewer bugs to swat or bulbs to trample. Watch for excessive running sap. Summer: after leaves are full size, through early September. Good to see foliage masses for thinning and layering. Easier to identify dead.

The winter months – December, January, and February – are the best time to prune oak trees. Deciduous trees can be pruned at other times of the year with little or no negative consequences. However, if possible, avoid pruning deciduous trees in spring when the trees are leafing out and in fall when the trees are dropping their leaves.