Faced with global warming and increasingly pronounced periods of drought, vine irrigation has become a major challenge for Valais winegrowers. Preserving grape quality while using water judiciously is now an absolute priority in the vineyards.
For several years now, irrigation methods have evolved significantly. Gone are the long sprinklings that humidified the entire vine and led to significant water loss through evaporation. These techniques, being neither ecological nor precise, also promoted the development of fungal diseases by wetting leaves and grape bunches.
As pioneers in this more sustainable approach, we have progressively equipped all our plots with a drip irrigation system. Installed a few centimeters from the ground, these pipes deliver water directly to the base of the vine, without touching the foliage or the grapes. The plant is thus better protected, and water resources are used with much greater precision.
The right water balance, key to grape quality
Proper water management plays a fundamental role in vine development. A plant that is adequately supplied can ensure its growth and bring the grapes to perfect maturity.
Contrary to popular belief, slight water stress is beneficial for the vine. By drawing water deeper into the soil, the roots strengthen their anchorage and promote a better expression of the terroir. However, this delicate balance requires constant observation of the vineyard and a thorough knowledge of the soils.
Irrigation also depends heavily on winter and spring climatic conditions. In some years, significant snowfall and spring rains allow for sufficient reserves to build up in the soil. Other vintages, however, begin with drought conditions.
With approximately 500 mm of annual precipitation, Valais remains one of the driest regions in Switzerland. When winter and spring lack water, it becomes essential to intervene quickly before the period of strong vegetative growth, which is particularly demanding for the vine.
Preserving the Future of Valais Vineyards
Today, irrigating no longer simply means watering. It means supporting the vine with precision, intelligence, and parsimony to sustainably preserve natural resources while guaranteeing high-quality grapes.
This reasoned approach to irrigation is now an integral part of modern viticulture in Valais. An essential evolution to continue producing authentic, balanced wines true to their terroir despite future climatic challenges.
