How do I harvest cannabis? Robyn April 11, 2018 03:11 Updated Follow In the video below, our Horticulturalist Stephen, shows us exactly what you need to do once your grow is finished. Related articles Seed Selection Guide Growing Timeline - What to Expect When will my Grobo order ship? My nutrient bottles are low - what do I do? Draining and Filling Your Grobo Unit Comments 0 comments Please sign in to leave a comment.