Are you growing in soil? Before I switched,I would get the ph of the soil neutral or as close to that as I could.You can do this by flushing them. Once you have the soil like you should.That is where your common sense comes into play.Use your best judgement. When you pick a nute to use for flowering,use one with a high P rating. Low on the N and K. When you change like that you are raising your levels of nutes,if you use one with a higher number.

Ga Grown!