They look fried.....too dry or too much fertilizer. First thing is keep them moist always....an hour dry is an hour too much. Second stop putting crap on them. Third STOP PUTTING CRAP ON THEM. :)

If the PH is off that will show up overtime but it won't kill them quickly and is easy to reverse. Trying to fix them by adding more and more chemicals will kill them quickly. First thing is water them very very well to try to flush them out. Second throw away that aluminum sulfate and slap whoever told you to use it.

What did you use to amend the soil? What is your soil like? When did you plant them? If it was recently that is part of the problem as well. Summer is just not the right time to put them in the ground.

soil ammendment:
http://www.greenplanetnaturals.com/acidic-planting-mix.html

planted: early march (they were completely healthy then)

i'll water twice daily in the peak of summer i suppose, even though i watered last nite the soil was pretty dry today. i was afraid to keep them too moist as supposedly root rot is another issue to watch out for.

no more aluminum sulphate, rgr. but then how do i bring down soil ph to ideal range?

Well you can use pelleted sulfur to bring it down but the stuff works slowly. You can use vinegar for a temp fix or you can use sulfuric acid. If your mix is good and acidic it is best if you just use rainwater for irrigation as that solves the PH problem. Right now your plant is super stressed so you will have to baby it.....