Are you topping or completely removing the plants?? You can top them until the buds are done (although not the best thing for the plants it will get you through this harvest). You want to harvest the buds when 1/2 to 2/3 of the white hairs turn red/orange. Or when the crystal heads are full and milky white. If you wait until the crystal heads are amber, you've waited too long. For your next grow look into doing this, it's perfect for very small grow areas.
SoG (Sea Of Green)