A single tree branch changing color is one of the considerations that Master Gardeners use to determine if a tree is drought stressed from lack of water. Although the hottest weather has ended, trees still need water.

BAKER CITY — Although the weather has cooled from a summer of record-breaking heat, your yard — and especially the trees — still need water.

“Don’t forget to water — you don’t have to water often, but water deeply,” said Mindy Sherrieb, a volunteer with the OSU Extension Master Gardener program in Baker County.

Sherrieb and other Master Gardeners are available to answer questions about trees, insects, gardens and plants as part of the volunteer hours required for the program.

The latest concern, she said, is about trees that have one branch changing color, while the rest of the leaves are green. She said this is often a sign that the tree needs more water.

“We’re seeing drought stress in trees,” she said.

Most tree roots are within one to three feet of the soil surface, and she said it’s important to soak the area well.

“If you water deeply once a week until it freezes, your tree should be able to survive the winter,” she said.

If you have a question for a Master Gardener, call an OSU Extension office near you:

• Baker County: 541-523-6418
• Union County: 541-963-1010
• Umatilla County: 541-278-5403 (Pendleton); 541-567-9306 (Hermiston)