More than 200 pages and 150 illustrations (photographs, drawings and diagrams) This book addresses in a practical and illustrated manner, all the aspects necessary to cultivate medical and recreational marijuana indoors using soil, in the most sustainable way possible and using LED lights. This is a practical book written to allow anyone to grow indoors according to their needs, always trying to be more energy efficient and more responsible to the environment. We cover a wide range of topics: - Adequate choice of LED lights and systems of extraction and intraction. - Step-by-step assembly of the grow tent. - Recommendations and practical examples during all stages of growing. - Organic and biological treatment of pests and deficiencies. - Use of electronic devices to monitor the conditions of our grow tent and introduce mechanisms of alert and safety against fires and unauthorized accesses. - Designs to be printed in 3D, with which we will be able to manufacture our own parts, adapters, holders and pots. We have designed a special transplant pot that we make available to all our readers, which minimizes the stress associated with transplants, contributing to a healthier and stronger crop. This book can be used as a reference manual in the case that we are growing with another type of lighting. In addition, through our website weedomancer.com/en, we will offer to all our readers a direct channel of communication with the authors of the book, the photographs in high quality, the download of the necessary files for 3D printing of everything we need to cultivate, as well as updates, specific manuals and monitoring templates, accessible from the mobile to keep a daily tracking of each one of our crops. A summary of the index: 1. Choosing the place to growing 2. Calculations and recommendations ----Grow tent and basic measures ----Plant pots ----Power consumption needs ----Extraction flow calculation ----Intraction flow calculation ----Active carbon filter flow calculation 3. LED lamps ----Spectrum ----Intensity of light ----CRI 4. Required material and shopping list ----Grow tent ----Recommended LED lights ----Extractors and intractors ----Active carbon filters ----PH ----Seeds ----Others 5. Grow tent: assembly 6. Watering ----Calibration and pH adjustment ----Water treatment ----When and how to water ----Fertilizing 7. From seed to bud ----Germination ----Transplant ----Growth ----Pre-flowering ----Flowering 8. Trimming and drying 9. Curing and storage 10. Deficiencies, excesses and diseases 11. Designs for 3D printing 12. Templates, apps and devices for crop tracking and monitoring