elm corkbark chineseelm

Hello fellow bonsai people. I apologize if this has been answered in the past or if it’s novice question. My JBP and cork elms have had yellow leaves/ yellow tips on needles. Is this normal this time of year? Im watering less since it’s beginning to cool down. I’m in Southern California...

My cork bark elms were thriving up until a month or so ago. All the new buds have turned brown and dried up, and some the the leaves are turning yellow/brown. They were repotted last spring and are watered when needed and fertilized with a slow release pellet. No visible pests and no history of...