its was barerooted from its original field dirt to lava and pumice in spring 2018.
Unless you used 10% (give or take) or more 8822, a sure fire way to slow a tree down
is to repot 2 years running. I know it's not 2 years running, but you've been going at this each year
with something major. I would remove the brown tips, stop the granules, and Fert it with Alaskan 5-1-1
weekly, and Superthrive when you have to water. Needs rest and Sun I would bet.
Reassess Summer 2022 for thinning maybe, maybe not.
Are you pre watering ahead of the heat every day before work only to come home to soil that doesn't need watering?
Might skip a day here n there if you are. Is the water passing through ok? Any DE?