Not trying to be a dick, but thats the last thing I'd do. If you dont know what your problem is, step one is always testing your pH. NEVER add nutrients until you know your pH is correct, and is not your problem. If your pH is off, the plant will not be able to uptake certain nutrients, making it LOOK like a deficiency. When in reality- all the nutes it needs are in the soil... it just cant use any of it because of the pH. What looks like a deficiency can very easily be a deficiency CAUSED BY a pH lockout.
No clue to be honest. I order almost all of my grow supplies via the internets. If home depot doesnt have it, I usually order it. If you want to start correcting the problem TODAY, give the plants a good flush with distilled water, which is always a pH of 7. In the mean time, try to get a tester. If you can find one at a store, I doubt it would be more than $50. Mine was $23 shipped.
I was going on two things
1. Depending on the severity of his pH problem, the plant's growth may not be noticeably slowed.I was going on two things
#1, the plant is pretty healthy looking, looks like a mature plant, if it were PH problems why would the plant look so good?
#2, he said something like " it can't be nute burn" which led me to believe that he is not adding much in the way of nutrients, ergo a flush and mild nute dose might help.
But you are right , knowing what your water PH is , is a good thing.
