To produce the Semillon Gris La Colline (Rooi Groen Druif) Raised by Wolves, after 10 days of carbonic maceration, the mostly fermented must was pressed off to neutral 500L and 228L barrels to complete fermentation. Here it matured for 9 months before racking and bottling.
The La Colline vineyard is uniquely South African in that dark skinned Semillon vines are inter-planted with light skinned Semillon. It was planted 82 yrs ago on the southern slope of Dassenberg in Franschhoek on soils of decomposed granite with quartz, and 310–350m above sea-level. In summer, the tightly-planted bushvines forma wild looking mess. Sémillon Gris is historically significant in South Africa, not just for the old vine aspect, but for its previous popularity. In the early 1800s, 80% of the vines in South Africa were thought to be Semillon. By the mid-1800s 50% of the Semillon had gone through the natural mutation and turned into Semillon Gris. This variation of the variety only happens slowly, vine per vine, after the vines are at least 30 years old. 70% of the vineyard is now Sémillon Gris, so it is hand picked to ensure that only the Gris bunches are picked.