Do I need to use supplements or check ph?

I have 3 babies from clones- blue dream. Still getting them used to new spot on roof deck with 6 hrs direct sun and breezes at night. These seem more delicate than the last time we grew, ( 1 other time) with just water and sun nothing else, they did pretty well. I want to keep things simple and not sure I should use any supplements or if I should only water with correct ph. Any advise? I am keeping them in shade for a bit more to get them to "harden". Does this sound right? Learning all the lingo and methods!