The experts surmise Norton is likely a cross between V. aestivalis and an unknown V. vinifera species. There is possibly some contribution of V. labrusca.
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Verdelho: More than Madeira
Verdelho is the most widely planted grape on the Portuguese island of Madeira.
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Barbera
Barbera frequently comes in with high acidity but, with the right winemaking approach, it makes a food-friendly red for people who drink wine every day.