Honey harvested from some parts of New Zealand (usually between Jan-Apr) can carry a risk of Tutin contamination. We recommend that you familiarise yourself with the risks associated with Tutin, and seek advice from experienced beekeepers on managing your hives.
The NZ Ministry of Primary Industries have produced this great PDF factsheet for managing Tutin contamination.
It is well known across the world that Rhododendron honey can also cause toxicity. These flowers bloom in winter, and like with Tutin contamination, we recommend you seek that advice from local experienced beekeepers on managing your hives, and whether this may be an issue in your area.