i think the runoff water you tested would be more accurate than testing the soil itself. just my two cents, but i think you need to raise the pH.
dutch.lover Reviewed by dutch.lover on . pH runoff is lower than the pH of the medium I placed a few seeds in some Canadian Sphagnum Peatmoss mixed with perlite. After I poured some neutral RO water through it to wet it, I tested the soil with two seperate rapidtesters and both showed pH of 6.8. The runoff, I tested with my hanna tester (which is calibrated and accurate) tested at 4.9 pH. It's been 36 hours since I did the test and the seeds did sprout but I'm not sure what my pH is. Or what it should be since I am growing them in a soilless medium. Rating: 5