yea if u misjudge yr veg or yr plants stretch more than u expect and you start to run out of height u can tie the tops down, just get a brick or anything weighty tie some string around it and place on the floor, bend yr plant over slightly and tie the other end of string around the stem near the top, if needed u can gradually shorten the string as the plant grows, preventing it from hitting the top of yr growroom or lights, or u can train yr plant to grow in pretty much any direction you want starting in veg, tying and staking branches and the stem, it must be done gradually tho a bit each day, or u can top yr plant while in veg slowing upwards growth and promoting longer side branching.