Plants, some of them thrive, others not so much

It’s been quite a dry summer so far, so every couple of days, I’m out there watering our tree’s.
Some are doing well, others not so much. I haven’t figured out why.

I’ve had tree’s go well for months, then suddenly go backwards at a great rate of knots! . I found that if I move these tree’s to a new location, they take off again -I don’t know why, but it works..