basically its all wrong!
for flowering in soil or hydro the ideal ph is less in grow than flower!
a higher PH during the flowering period of UP TO 7. is good to allow better absorbtio0n of the nutes, in soil it is normally found the optimum for nute consumption in the grow stage is 6. to 6,5, however in flower period this should be at 6.5 to 7. the higher ph allows for the P K to be absorbed more effectivly, ideal ranges change in hydro, but the principles are the same,
however there are no reasons to drop as low as 5.2! the calcium is the only element that is drawn in a ph 5.5 or less!, there fore in hydro GROW we start the tanks at 5.5 allow to rise to 6 max , and then back down to 5.5 again, the reason being that the nitrogen needed for growing is available between 5.5 and 6.2, pottasium and K are found at the ranges of 5.7 to 6.5, and can be allowed to run up to 7 in soil. maintaining an extra high PH will effectivly block out nitrogen intake and only allow for the PK to be absorbed for flowering! keeping the feeds within these ranges will ensure good absorbtion of nutrients threw the roots

good luck, and maybe buy a good book, so as to avoid bad unfounded advice from some in here!

welcome to the world of endless possibilities,,,,,hydroponics
mistyganjatree Reviewed by mistyganjatree on . Ph Question..... Should I be trying to match my Ph in my Water to the Ph of my soil? Example.. I had done a grow in ProMix BX Ph7 and My Tap water was Ph 7. the grow worked out decent but could it be better? I used Botanicare Pure Gro Pro nutes for veg and pure Pro Bloom for Flower. I used ProMix. I added just water untill the 4th week. then I satrted adding some nutes (1/4 strength watered down). at about Week 5 and 1/2 I tested the water runoff of My Soil. It was 5.5 seemed low. I thought you Rating: 5