When and Why to Prune Trees in Southern California
When and Why to Prune Trees in Southern California
Pruning is one of the most important practices in tree care, especially in a region like Southern California where climate, pests, and seasonal extremes all affect tree health. Done correctly, pruning enhances a tree's structure, reduces risk, improves appearance, and encourages healthy growth. Done poorly, it can cause long-term damage or create hazards.
So, when should you prune trees in Southern California? And why is it so important to do it at the right time?
Best Time to Prune Trees in Southern California
Because of our unique Mediterranean climate, Southern California doesn’t have the same dormancy-driven pruning calendar as colder regions. Instead, timing should depend on the type of tree and the desired outcome:
Winter (December – February): Most Deciduous Trees and Heavy Sap Flow Trees
Why: Pruning while trees are dormant helps reduce stress and allows you to better see the branch structure.
What to Prune: Most deciduous trees along with non-deciduous trees like pines, eucalyptus, etc. which have heavier sap flow during the growing season.
Spring (March – May): Light Pruning and Cleanup
Why: Great time for light shaping, removing suckers or water sprouts, and post-winter cleanup.
Caution: Avoid heavy pruning during active growth—this can weaken the tree.
Summer (June – August): Structural Pruning & Safety Trims
Why: Summer is perfect for reducing weight on long limbs, opening the canopy for airflow, and removing dead or dangerous branches before wildfire and storm seasons.
Fall (September – November): Prepare for Dormancy
Why: Good time to prune non-deciduous trees. Avoid major cuts on sensitive trees going into dormancy.
Why Pruning Matters
Safety
Overgrown or poorly structured trees can drop limbs in high winds or after heavy rains. Strategic pruning reduces the chance of property damage or injury.
Tree Health
Removing diseased, damaged, or deadwood improves the tree’s ability to heal and directs energy toward healthy growth.
Appearance & Property Value
A properly pruned tree looks balanced, open, and healthy—adding curb appeal and value to your home.
Fruit Production
For fruit trees, pruning can stimulate new fruiting wood, improve sunlight penetration, and increase overall yield.
Avoid These Common Pruning Mistakes
Topping: Never cut the top off a tree—it causes weak growth and long-term damage.
Over-pruning: There is no percentage rule like most people tend to believe, trees should be evaluated case-by-case.
Wrong timing: Pruning at the wrong time can attract pests or disease, or reduce bloom and fruit.
Trust a Certified Arborist
At Cambium Tree Experts, we understand the biology behind every cut. We’re certified, licensed, and locally experienced in what works for Southern California trees. Whether you're prepping for fire season, trying to get more fruit, or just want to shape things up—we’ll help you do it right.
Schedule a free consultation today: 909-855-1447
Cambium Tree Experts – Redlands, CA
Certified Arborist | Licensed Contractor | Degree in Plant Science