Phoenix’s summers can be brutal—not just for people, but for trees too. If you’ve been thinking about adding new trees to your yard, timing is everything. While spring might seem like the right choice, local arborists agree: fall is the best time to plant trees in Phoenix.
After surviving months of intense summer heat, fall brings a welcome break with cooler temperatures and gentler sun exposure. This gives young trees a chance to settle in without the stress of high heat or heavy watering demands.
Cooler air + warm soil = perfect root growth conditions.
During fall, the soil remains warm enough to encourage root expansion, while the air temperature drops—reducing water loss from leaves and stress on the tree canopy.
Root Growth Before the Summer Heat Returns
Planting in fall allows your new trees to focus on root development instead of top growth.
By the time summer arrives, your trees already have a stronger, deeper root system to help them:
Absorb water efficiently
Resist drought and heat stress
Stay upright during monsoon winds
This is especially important for shade trees, citrus, and desert-adapted species that thrive in Arizona’s soil when given a strong start.
The Role of Soil & Irrigation
Phoenix’s desert soils can be challenging, so pairing fall planting with proper soil amendments and irrigation setup is key.
Valley Tree Care recommends:
Soil conditioning to improve nutrient absorption
Deep watering schedules to encourage downward root growth
HydroGuard application for moisture retention and protection during winter chills
Don’t Wait Until Spring 
Planting in spring forces young trees to establish roots under rising heat, which can shock or even kill them if watering isn’t precise.
By planting in fall, you give your tree a six-month head start before temperatures climb again.
Schedule a FREE evaluation for planting your trees!
Our certified Arborist at Valley Tree Care can help you select, plant, and protect the
right tree for your property!