blueberry in sea of green?

just wondering if anyone has tried blueberry in a sea of green style grow. I've heard that with blueberry you have to top and train to get good yields. I was thinking i'd do maybe 12 ladies each in 2 gal pots under a 400 watter and just start flowering them 4 days to a week after planting them (they're clones). After that, just let them grow straight up; no topping or training. Also, anybody have any input based on experience as to whether cutting off the lower branches would increase the size of the main kola enough to make this technique worthwhile? thanks all