I don't think it matters much since you won't be able to actually harvest any fruit (which I'm too far north for too. As soon as there's a firm frost, everything above ground turns to mush, though the roots are always reach to grow new leaves again the next year.) I'd just keep it moist & apply plenty of compost around the base. Give some pureรฉd banana water &/or compost tea when possible. You should have plenty of tropical looking leaves.
