it's 3 plants, the screen is about 21" x 3'9". i yeilded 12 oz last time and i'm expecting a good amount more this time. i trained them alot better this grow. and last grow i made a mistake and added too much blood and bone meal when mixing the soil and it had a tremendous effect on the grow substantially lowering the yeild. so this grow is much better than the last. the buds are so full of trichs that the look white!