UI Extension Master Gardeners UI Extension Events UI Extension Idaho Landscapes and Gardens Seasonal Topics UI Extension Idaho Landscapes and Gardens Get Answers UI Extension Idaho Landscapes and Gardens UI Extension Idaho's Growing Regions University of Idaho Extension UI Extension Idaho Landscapes and Gardens UI Extension Idaho Landscapes and Gardens Image Map
Aug 132012
 

Selecting the proper time to prune is important. Heavy pruning at the wrong time of year can stimulate unwanted growth or prevent flowering or fruiting. Before pruning, consider time of year, type of plant and flowering periods of certain plants. See the table below.


Time of Year to Prune Various Types of Plants.
Season
Type of plant Fall Winter Spring Summer Comments
Early Late Early Late Early Late Early Late
Deciduous shrubs for shrubs
that flower before
June 1
Deciduous shrubs for shrubs
that flower after
May 30
Deciduous
trees
a
Conifers –
Shrubs and
Trees
All conifers
except for pines
(see below)
a
Pines
a
Broadleaf
evergreen
shrubs
For shrubs grown
for flowers
Broad leaf
evergreen
shrubs
For shrubs grown for foliage (hedge)

When to Prune New Growth on Pines

Pines have buds only at the tip of the branches. If a branch is pruned after a growth flush and the terminal bud is removed, regrowth is impossible. Pine branches should be pruned or pinched in early summer when the new branch (candle) has begun to elongate but before the needle bundles open. This pruning causes the growth to be more compact but still allows buds to form for the following year.

 August 13, 2012