The soil of the Hemel-en-Aarde Valley is predominantly Malmesbury Shale (a duplex structure). The top layer consists of a mixture of clay (15-30%) and gravel (ironstone and granite particles) and the lower layer is clay shale, which secures a source of moisture.

Vines are planted on gentle slopes in a north-south direction, which takes advantage of the daily travel of sunlight from east to west and ensures equitable sunlight exposure. Vineyard practices are in keeping with planting and trellising methods of the most respected French wine-producing areas, with vine density exceeding 9000 vines per hectare. More than 50% of the vineyard is dedicated to Pinot noir.

The climate of Walker Bay is largely influenced by the nearby, cold Atlantic Ocean rendering it one of the coolest wine growing areas in the Cape. The valley is surrounded and sheltered by a mountain barrier, formed by Galpin Peak (810 meters) and the Tower of Babel (1200 meters), which traps the cloud cover and moisture brought in from the sea by the prevailing wind. Summer conditions are consequently warm rather than hot, and winter conditions are mild and frost-free. The sea breezes work to keep vines cool thereby encouraging slow ripening and flavour-rich grapes.