super secret

Hey all, So I am attempting to do a super-stealth, 1 plant, indoor closet grow, by using a couple of cardboard boxes as my "grow tent". Right now Its dimensions are L: 1' 5 1/2"; W: 1' 3"; H: 2' 7 1/2". Is this a decent size for Girl Scout Cookie? Or should I make it bigger; I know I would...