How do I harvest cannabis? Robyn March 21, 2018 15:09 Updated Follow In the video below, our Horticulturalist Stephen, shows us exactly what you need to do once your grow is finished. Related articles Growing Timeline - What to Expect When will my Grobo order ship? Seed Selection Guide Draining and Filling Your Grobo Unit My nutrient bottles are low - what do I do? Comments 0 comments Please sign in to leave a comment.