Hey man,

The 5-9 gal buckets will grow real nice. I'd go a little bigger than the five gal for outdoors if you can get em. Have you considered just growing directly in the ground? If you prepare the bed real good, you will not only get better growth, but also it will maintain itself better, require less watering, less feeding and less overall attendance. Try two of the same strain next to each other some time and you'll see. If thats not an option for you, the big buckets will also work real good.