Mammoth’s connection with the Moutere hills of Nelson began with the planting of a vineyard in Gardner Valley Road in Up… per Moutere more than thirty years ago. Today Mammoth produces some of the region’s best wines. Nelson has some of the highest sunshine hours in New Zealand – averaging 2400 hours of sun annually. It also has long dry summer days and cool nights: the perfect combination to provide lifted fruit character and good natural acidity. The key to Nelson’s ability to produce ou