How to Lower Organic Soil PH?

Top dress with agricultural sulfur........but do it gradually, a little at a time......a tablespoon or two every week.

same thing we do everynight, pinky. Try to take over the world! add acid. that's how you mitigate high pH. (or base for low pH) it is log scale, so don't tinkg if it's 1 over your target you want to go 1 below.. the further from 7 the more magnified the effect will be. e.g. if you want 6.5 and getting 7.5, 5.5 is not the answer. It'll be higher than that to correct course (this example is simplified.. the volume of water that exists and how much you add to that will impact what is needed too) try 5.8-6.0 for a bit and if not detrimental to how you fertilize, get a little excess runoff. if the ph-imbalance is from your nutes, then it shouldn't be too hard to fix. If it is from some result of microbial life in your substrate, you aren't going to put much of a dent in it. biobizz is coco? so, maybe get a fertilizer that's ph-balanced and buffered next time. pH drift should be rare and/or small enough to be irrelevant. In a soilless/hydro context it is a sign of a poorly manufactured product. Soil nutes are a differnt animal and have some excuses for such things.

What ph soil meter you use , 5$ from amazon ? Or 300-500 normal tester ??? If first - throw it out. That cheap shit shows how fat is milk, but not ph of soil ;) Best way to correct soil ph is to load right one when soil is dry. So only two rules : Pot easy to lift, aka soil dry, only then you water. Have good wet/dry cycle. You water 6.3 dechlorinated phed water in.