Healthy cannabis plants grown in soil require a steady pH level of 7. As your plants grows it absorbs nutrients and adds waste materials back into the soil. This addition of waste will cause pH to fluctuate, which makes it important to test your pH at least once a week and 1-2 days after feeding. If your pH has shifted outside of the 6-8 range, you should adjust the pH using pH calibrating solutions. If you have pH-up or pH-down solutions, just follow the instructions. Trial and error is very common practice with pH adjustments. There is a third solution called a pH Buffer #7, which is always at neutral and is used to calibrate your testing tools. HYDROPONICSPlease note that hydroponic plants require a steady range of 5.2-6.3, and tends to change very quickly. Ensure that you check your pH levels much more regularly, if not daily, if you are growing using a hydroponic system. JUMP TO PH CONTROLJUMP TO HYDROPONICS