banana berserker

hi! im afraid to put my rajapuri in the ground because im afraid when i have to dig it up for the winter ill accidentall dig it up wrong and chop some of the roots or i might hit the corm. i don't want top take any chances! i was wondering is it ok to keep it in a pot all year as long as i take it outside when its warm? if i can do i need to aply more fertilizer or something like that? what size should the pot be for a full sized rajapuri? thanks in advance!