how big of a light do you have, need big hid to penetrate the canopy of plants, and if their too bushy bottom sites wont see much light

could use yarn and tie up the branches to get better light penetration

put a good oscilating fan on the tops of plants and posibly bottoms of plants too is good for air circulation and stregnthens the stem when the bush sways

hope this helps alittle as i hit the bong hehe