what is the best ph for growing cannabis
Ideal Ph Levels for Growing Cannabis. When growing cannabis in soil the Ph should usually be around the 6.5 â 7.0 mark. When growing in pots, a single Ph reading for each pot is advised. When growing outdoors it is best to take two or three Ph measurements from different areas of the grow area.he Ph level of your soil will ascertain how well your cannabis plants are able to take up the nutrients. If the Ph level is out of the correct range, the growth rate of the plants can stall or even stop.