Quote Originally Posted by potofgold
i just went threw my book, a did read from Edd Rosenthal says hydro ph should be kept between 6.1-6.3 and soil should be kept around 5.9-6.4. keep rockwool ph at the lower end of the recommended measure to counteract RW stong alkalinity.

now jorge cervantes says in his book that hydro should be 5.8-6.0 and soil 6.5-7.
i alwas wonderd witch author was better, they both say total differnt things in each book. i tend to like edd more IMHO.
this is why i posted my notes to get things cleard up for me and to get some advice on things.
Actually the best source for PH info would be to check what the mfg of your nutrients reccomends. In my case I use Dutch Master's, gold in my RW and Advance in the container grow. What I like about them is the recommendation for Pro-mix and sunshine-mix. A lot of mfg don't address the issue of pro-mix, which falls between pure hydo and soil.

Counter to what alot of people believe, a change in the ph from what you put in to what you get out is a good thing. We need a certian amount of "ph shift" to allow all the nutrients to be available to the plant, since the max uptake of each, N P K, is different at different PH's. (Hope I'm not being too confusing here).
oldmac Reviewed by oldmac on . my grow notes. here are some of my grow notes i took fron reading books and trial and err. fell free to add somthings i missed or dont know. i would like to get some good growing tips to add, or maybe this will help somone. GROWING TIPS & TRICKS Air temperature · Day = 72-76*F · Night = 62-67*F. Temperature should not drop more then 10*F during the night time. Rating: 5