Fred, I do have a ph meter but I guess it doesn't work too well hanging up on the shed wall. I just have never had much faith in it, probably because I never actually followed the proper directions. But I will get it out and re-read the instructions (something about putting the soil in a jar and wetting it thoroughly) then putting the probes into the soil. I always wanted to just stick it in the ground an get a reading, lazy I guess...poor excuse.