I have not grown jackfruit, but I have seen its huge tree and equally huge and heavy fruit in the Phil. It thrives on very hot and humid conditions..think humidity of 90F and higher, and torrential moonsoon rains. It is a huge tree with yummy spiny aromatic fruits. I think it needs to be protected if you intend to grow it in colder areas..if it will thrive at all. I think wet and hot temps okay..but not wet and very cold temps.