Retransplant 1 more time with at least 10-12 gallon of soil for each plant and don't do it anymore.If it doesn't have enough soil it gets stunted when the roots run out off room.(check out the faq's)Make sure you use a good potting soil preferably no nutes in the soil all ready.I would suggest trying topping ,bending and just leaving it alone and see what you like best.