Nutrients Nitrogen N , phosphorus P , and potassium K are the three basic cannabis nutrients that the plants require during its growing process. If the lawn has grass that is already established, this works well. More difficult to grow Requires manual light adjustment More sensitive to environmental factors.  Source: <a href="https://fukusi.sikaku-style.com/2013/06/best-purchase-cannabis-seeds-greatest-worth-and-wide-range-fso.html" rel="nofollow">https://fukusi.sikaku-style.com/2013/06/best-purchase-cannabis-seeds-greatest-worth-and-wide-range-fso.html</a>