I planted a bare root santa rosa plum early this year, and it seemed to be doing really well. I had the guy at the nursery prune it up for me when I bought as I still don't necesarily know the best way to do things.

Anyway, it seemed happy, with lots of nice healthy leaves. Then some time last month it started looking like all the leaves were stressed, they looked somewhat curled and kind of crispy, and then started dropping off. I upped my watering but it didn't seem to slow the leaf drop, I'd say I'm probably down to about 30-40% leaves left on the tree.

However, today I did notice nice new leaf shoots all over the tree so I don't think it's up and dying on me yet. Was it maybe just getting sunburned earlier on and now recovering with some cooler temps and morning fog, or is this normal behavior for a young plum tree? I don't have any pics (cam batteries are dead and I need to buy more) but could get some if it would help.