The Sauvignon Blanc and Semillon vines were planted in 1977, hence the name Circa 77. The estate-grown vines are planted in the Boodjidup and Lagan vineyards in the Wallcliffe subregion of Margaret River. The vines flourish in the ancient granite soils, which have an abundance of ironstone gravel. These free-draining soils have low water and nutrient holding capacities, providing the optimum growing conditions to achieve balance between foliage and fruit, and deliver superb aroma and flavour intensity. The Indian and Southern Oceans meet here, engulfing the vineyards with fresh, sea breezes, promoting natural balance. The vineyard is managed sustainably with an aim of continual improvement of the natural environment focussing on soil and vine health, including biodiversity and weed management from sheep grazing.