Yes, the estate has been committed to a rigorous environmental approach for many years. Grand-Puy Lacoste practises sustainable viticulture with great conviction: over twenty years, treatments have been reduced by half. No insecticides have been used over the past ten years, and wildlife has reclaimed its place. Soil work has always been exclusively mechanical: ploughing, no herbicides, double Guyot pruning. These commitments are officially recognised: viticulture at Château Grand-Puy Lacoste is guided by a deep commitment to sustainability, attested by the Terra Vitis and HVE 3 (Haute Valeur Environnementale Level 3) certifications.