All my plants that went in 1 gallon containers grew better than plants put directly in 5 gallon pots. These one gallon plants were generally smaller when initially planted, but quickly outpaced the others in 5 gallons. Their growth was mostly vertical though, while the ones in bigger pots are tending to be bushier and more compact. It's very interesting though and all are in 5 gallon now and doing well. I may go from cups to 1 gallon for all my plants in the future, but I want to see what the final results are late in the season, especially pod production.