Porters vineyard was planted by Annabel and John Porter in 1992. It is a tiny winery specialising in Pinot Noir and Pinot Gris wines. The vineyard is just 5 acres located on Kitchener Street, the main road into Martinborough. Yields are low and the emphasis is on producing grapes of the best quality every vintage. Porter's wines are served in top Wellington restaurants including Logan Brown, The White House, Boulcott Street Bistro and Icon. Organic principles and practices are adopted wherever possible. Vine prunings are either burnt or mulched back into the soil, the pips and skins from the pressed grapes are composted and used as mulch, and sprays are kept to a minimum. In addition to wine Porter's produces a tiny quantity of essential lavender oil and its own extra virgin olive oil.

Porters also offers luxury accommodation in the loft above the winery.