Your plants look smaller than most that have been vegged two months. How far away is your light? HPS should be 12-18" away depending on heat. My grow was slowed by having the light too far away, but after moving it closer I noticed an incredible difference. The other issue might be CO2 levels. If you are growing in an enclosed space or don't have fresh air circulating all the time, the plants can't get enough CO2 in the air to grow to optimal size. Let us know and we can help guide you towards a bigger grow!
