Why PIWIs?
PIWI stands for the German pilzwiderstandsfähig: fungus-resistant. These are crossings that include other Vitis species besides Vitis vinifera, so the vine suffers far less from powdery and downy mildew. In a wet maritime climate that is the main growing risk, so PIWIs need much less crop protection. Many varieties also ripen early and tolerate frost.
For a long time PIWIs were not allowed in PDO wine. Since Regulation (EU) 2021/2117 they are, and the PDOs Oolde, Achterhoek-Winterswijk, Rivierenland and Twente permit varieties such as Regent, Pinotin and Cabernet Cortis. At the same time plantings are shifting: in 2025, for the first time, more black than white vines were planted, with a lot of Pinot Meunier, Chardonnay and Pinot Noir for sparkling wine.