If your in dirt or a mix most of the time they run 7 to 7.8 ph, so don't worry about it as long as were not talking 5.4 or lower. Mix and use as needed. If you can find worm castings to mix in at a rate of 20% by volume than they will auto ph your soil for up to 2 years and help bug proof your plants and add important elements. Worm Castings are the secret magic bullet for garners.