by Greg Green
Soil comes in many types and varieties. What you will find as you go along is that you will add various ingredients to your soil to improve plant growth.
The Cannabis plant will grow long and winding roots into the soil. These roots absorb water and other minerals from the soil to help it grow. The soil also goes through dry periods when you do not water your plant or when the plant has absorbed most of the water. During these dry periods air is allowed to creep in between the soil particles, allowing the roots to breathe.
There are 3 main factors to look at when buying soil. (1) pH, (2) Nutrients and (3) Structure.