As the northernmost region of New Zealand, and its extensive coastline and proximity to the sea, Northland is well positioned to establishing a significant banana industry. This page lists banana growers and links to further resources about banana growing.
This document from New South Wales Agriculture reveals that our summer temperatures in Northland are ideal for banana growth and might be better than hotter climates in Summer months.
If you know of other banana growers please leave details in a comment below.