Q.Planting a sapling
I have an 8-month-old White Oak sapling and I live in southwest AZ. I am wondering when is a good time to plant it, as it is about 18 inches tall in a pot, has about 12 leaves, and is healthy. I’m afraid that the hot sun would be too much for it now. We keep it indoors, maybe in the fall? I’d hate to lose it. Mel.

Certified GKH Gardening Expert
While the sun may be harmful, keeping it indoors will be almost as bad as it will have trouble getting enough light. If you can find a shady spot outside, that would be best.
Fall would be a good time to plant. This article will help with getting it established:
https://www.gardeningknowhow.com/ornamental/trees/tgen/watering-newly-planted-tree.htm