Château Grand-Jean belongs to Vignobles Dulon. The estate is quite large: 100 hectares, according to Dulon. Soil: clay-limestone, according to the winery. Bordeaux Blanc with 60% Sémillon, 20% Sauvignon Blanc, and 20% Sauvignon Gris. The wine is aged in vats ("elevage en cuve"). According to the Hachette guide, this 2024 Blanc has a 1-star "très réussi" (which is good). For the white cuvée: the grapes are pressed, the must is selected, and after fermentation, the wine is aged for 3 months "sur lie" to develop additional aromas and roundness. According to the producer (Vignobles Dulon), this wine has a "very aromatic nose" and a palate that balances the freshness of the Sauvignon Blanc with the fullness of the Sémillon. The finish is quite long, indicating good aromatic substance.