m0useanswered grow question 5 months ago I think it would work to your benefit to plant it in the earth.
You appear to have lots of land and the earth is great. if not an option then yea a up size in the pot would be nice. anything that's 2-3x its current.
I also grow with chicken manure pellets and love em. The brand I buy is called Acti-Sol. they are rated or organic farming in Canada and come out of Quebec, nice little company,
Good Luck!