6.5-7 is good for soil growing. 6 would be too low in my opinion, good for hydro(5.8 is the magic number) but too low for soil.


Go slow and make sure your have an accurate reading before you add more PH down. Sulpharic acid is strong shit and its easy to use to much.
drudown11 Reviewed by drudown11 on . Using PH Down I have stunted my plants because my soil had a too high of a ph 7.8. I have used lemon juice to get it down to 7. I plan on using sulfuric acid to make a ph down solution of 6.0, does this sound like a good number? another question how often should i use it. If i get the ph to the right level do my plants have a chance of rebounding. they are 2 weeks old but look only 4-5 days old. they are blue mystic autoflower and I have spent a lot of money on seeds. please help. I have learned my lesson Rating: 5