so I have a sunshine blueberry plant(semi-dwarf, evergreen blueberry) and have no room for it in the garden. I would like to grow it in a pot. The recommendation say 20 gallon. So what I have is a 30 gallon trashcan that is filled with a peat compost mix that I am not going to use. What I was wondering would the blueberry grow in this? will it out grow it?