Managing pH is crucial for cannabis plants to be able to take up nutrients through their roots. When the pH around the roots jumps up and down, it can stress the plant and cause brown spots to appear on the leaves. To fix your problem you need to pH at 6 and test runoff pH also since the pH of soil is at 8. When your runoff reaches around 7 you can start phing between 6.5 to 7 in veg and 6.0 to 6.5 in flower depending where she likes it. Yes you can use lemon but I recommend earth juice pH down its all natural and won't kill microbes in soil.
like 1
