Cullen produces wines from Margaret River, Western Australia's premier cool-climate region. The winery's portfolio centers on Sauvignon Blanc and Chardonnay, varieties that thrive in the region's maritime conditions. Moon Opposite Saturn Harvest Sauvignon Blanc and Kevin John Legacy Series Flower Day Chardonnay stand among the winery's highest-rated releases, both earning 98-point averages from prestige critics including Wine Advocate, Decanter, Wine Spectator, Falstaff, and Wine Enthusiast. Full Moon Harvest Sauvignon Blanc rounds out the core range at 97 points. Margaret River's temperate climate and gravelly soils produce wines of precision and depth—Sauvignon Blancs marked by mineral clarity and aromatic intensity, Chardonnays built on structure and complexity. Cullen's wines reflect the region's character: restrained, food-focused, and built for aging.