I would highly recommend getting a seed of a top tier variety. Maybe something like Amber seedling, Berry seedling, Boca Snob or whatever type you like. Make a nice big fertile mound and mulch it heavily. Plant the seed and protect in with a cage and shadecloth. Seedlings will fruit faster, relatively high percent are quality and it will have a perfect root system. Jackfruit has an aggressive root system and quickly gets contorted in pots. It wont be hard to prune the tree and protect it in winter. Jackfruit is horribly mislabeled coming out of one nursery I know of. PIN probably has accurately labeled plants but I don't know for sure. Just my 2 cents.