Fingersanswered grow question 5 years ago Hi Bob, topping can be done at different times depending on the growth strategy you are going for. If you are topping for a mainline, then you want to top after at least 6 nodes have grown. top down to the strongest 2 and remove any other nodes. If you are wanting to do a proper SCROG, you top at the 3rd, and remove the 1st, leaving node 2 and 3. With a SCROG the idea is to keep it low, and flat, so every cola gets the same amount of light and breathing room. With a mainline, your goal is to get your weight in a couple really long dense spears, so you focus all the growth on the most productive main nodes. Have fun with her and try them both at some point!