6.2 to 6.8 will be safe for most strains grown in dirt.
Zandor Reviewed by Zandor on . pH levels Hey, I just finally got my pH meter so now my question is- what is the ideal pH? I'm sure it's on this site somewhere but the search engine won't let you search the word pH... can someone answer my Q or direct me to a thread that talks about pH? Thanks a lot! Rating: 5