This Agro4pro growing manual provides up-to-date information on growing medicinal Cannabis in greenhouses. All the information is backed up by peer-reviewed scientific articles. This manual takes the voodoo out of growing Cannabis. Cannabis is like any other crop. If you are a good farmer or gardener you can grow any plant. This manual provides an Alternative to Organic (ATO) growing system for Cannabis. The chemical profile of Cannabis is very sensitive to changes in nutrition. With the present technology available we can't use organic fertilizers to produce a repeatable product for patients to use year in year out. This manual is good for both beginners and experienced farmers.