New Lemon plant in Arizona – Reddit Post

I notice both discoloration and browning of the leaves in this… It was planted 3 weeks ago… being watered 5 times a week… Initially the leaves drooped and then got back up… The leaves feel normal in the green parts… First week was little too hot… Can someone help me figure out what did wrong? don’t know if the browning was because of heat or any pest and why is it discoloring? Please let me know what to do.

It gets sun light 80% of the time.