PIWI Wine Is the Future, Pure and Simple

What exactly are PIWIs?

PIWI stands for fungus-resistant grape varieties. These are vines bred to be naturally resistant to common fungal diseases such as powdery and downy mildew. Diseases that, in conventional viticulture, regularly have to be controlled with fungicides – often several times a season.

PIWIs, by contrast, get by with dramatically fewer crop protection treatments. Not because they are “left chemical-free”, but because they have genetically learned to defend themselves. That does not make them artificial, but remarkably robust. A kind of immune system in the vineyard.

The opportunity for winegrowers: less pressure, more freedom

For winegrowers, this means one thing above all: room to manoeuvre. Fewer spraying runs, less soil compaction, less dependence on a weather window of “please, no rain just now”. In times of heatwaves, heavy rainfall, water shortages and new pests, this is not a luxury but a survival strategy.

PIWIs make many improvements possible

lower water consumption

significantly reduced pesticide exposure

more stable yields, even in extreme years

greater focus on soil life and biodiversity

And they open up new sensory avenues. Because PIWIs are not intent on copying Bordeaux or Burgundy – they tell their own story.

Europe’s wine cellars and deep scepticism

In Europe’s traditional wine regions, PIWIs were long regarded as outsiders. Too experimental. Not “typical” enough. Too young. Viticulture thrives on origin, recognisability and familiar aromas. And this was precisely where the conflict lay: what happens when tradition meets necessity?

Slowly, very slowly, the picture is changing. Not because PIWIs are “better”, but because they are honest. They adapt not to the label, but to the place. At a time when classic varieties are suffering from heat or losing acidity, PIWIs suddenly become interesting – not as a replacement, but as a complement.

A global perspective: viticulture under pressure

Globally, the pressure is even more apparent. Regions facing water shortages, rising temperatures or more aggressive pests can scarcely afford intensive crop protection – ecologically or economically. PIWIs make long-term viticulture possible there in the first place. Not spectacular, but pragmatic.

Delinat and the bigger picture

The Swiss wine company Delinat has been addressing precisely these questions for decades: how can wine be produced without depleting soils, wasting water or destroying ecosystems? PIWIs play a role here – not as a promise of salvation, but as a building block in a larger system of biodiversity, living soils and minimal intervention.

What does it all taste like? A journey through the glass

At a small winter tasting, 5 bottles were brought to the table, while a sixth was saved for warmer weather. After all, it is not only the conditions in the glass that significantly influence perception and the scope for enjoyment; the temperature outside also changes our view of the bigger picture. There is a reason why wines taste absolutely outstanding on holiday, while the very same wine barely stirs a breeze back home. So the adventurer named Aventura remains carefully sealed. All the others must submit to the familiar criteria and reveal their colour, finish and more straight away. 

Koo Kuu Red
A wine that shows that resilience has nothing to do with hardness. Almond and sweet cherry meet dried plum, the acidity holds everything together, and the alcohol is warmly integrated. The finish lingers without becoming astringent. No flexing of muscles – more a quiet resonance.

Koo Kuu White
Honey. And plenty of it. Hardly any fruit, but velvety sweetness, almost medium-sweet, without seeming cloying. A wine unafraid to be approachable. Perfect for people who say, “I don’t really like wine” – and then suddenly do.

Savian
Rhubarb, herbs, a rather restrained nose. Not a loud presence that fills the room, but a wine that unfolds slowly. Fruity and herbal, distinctive, almost a conversation rather than a monologue.

Mariage Rouge
Recalls Pinot Noir without imitating it. Soft, velvety, with delicate acidity. A good example of how familiar PIWIs can feel without losing their individuality.

Resistente
Rather quiet on the nose, then jammy on the palate, with cherry and abundant fruit. No aromatic fireworks, but honest flavour.

PIWIs tell a story of the future – with a sense of fun

Perhaps the next point is what really matters. PIWIs are not moralistic; they are practical. They do not seek to lecture, but to work. They make wine possible with fewer pesticides, greater peace of mind in the vineyard and new aromas in the glass.

And they bring back something that sometimes gets lost in wine: curiosity. Tasting without a template. Drinking without the pressure of expectations. Wine as play, not as a status symbol.

The future of wine will not be exclusively PIWI. But without PIWIs, it will be hard to imagine.