They're off to a flying start but they do bring impeccable credentials to the table. Sutherland was previously the viticulturalist and assistant winemaker at Neudorf Vineyard, one of New Zealand's premier producers, while Costar worked at Neudorf too, in sales and marketing.
So they're not exactly novices in the business of making wine, and getting people to buy it.
If the wines I tried recently are an indication of future vintages and what we can expect from Harakeke Farm, then this is great news for consumers looking for wonderful quality wine at genuinely competitive prices.
The vineyard is not large - about 3.5 ha on Moutere clays, planted on north-facing slopes slightly more inland than the Neudorf vineyards.
It's picture-postcard country and the simple, charming label features the distinctive New Zealand flax bush and the Maori word for flax - harakeke - gives it the name.
"We aim to make concentrated wines that are the product of our passion for quality and a sustainable approach to farming the land," says Sutherland.
It's working brilliantly so far.
Recommended
2010 Harakeke Farm Pinot Noir, $24
Yet more proof that Nelson can produce excellent pinots at unbelievable value: a wine of unerring quality from young vines. Elegant, with a nice mix of red fruits, toasty oak and savoury notes. Delicious.
2011 Harakeke Farm Riesling, $18
If it's time you revisited this too often ignored varietal, this is the one to re-ignite your ardour. It has wonderful fruit definition with zesty lime and refreshing acidity and a mineral underbelly, tending dry.