Old Vine Sémillon: Franschhoek Valley

Franschhoek Valley sits within the Coastal Region of South Africa's Wine of Origin scheme. The district gained standalone WO status in 2010, having previously operated as a sub-region of Paarl. Nestled in a mountain-enclosed valley east of Stellenbosch, the appellation covers 1,254 hectares of vineyards stretching from the valley floor up to mountain slopes. A planned Appellation Grand Prestige classification will anchor Sémillon, Chardonnay, and Cabernet Franc as the district's core cultivars.

• WO Franschhoek district officially recognized in 2010
• Previously classified as a sub-region of Paarl within the Coastal Region
• 1,254 hectares under vine across valley floor and mountain slopes
• Planned Grand Prestige Appellation to feature Sémillon, Chardonnay, and Cabernet Franc

Franschhoek has a Mediterranean climate (Csb classification) with mild wet winters averaging 12°C and dry warm summers peaking at 28°C. Diurnal temperature shifts reach up to 15 degrees, preserving acidity and phenolic complexity in the grapes. Rainfall varies dramatically across the valley, from 400mm on the valley floor to 2,000mm in the southwest corner, with a valley average of 700 to 1,000mm annually. Soils range from alluvial sandstone on the valley floor and decomposed granite on mountain slopes to clay soils on west-facing slopes and sandy loam in parts of the valley.

• Mediterranean climate with dry warm summers and wet mild winters
• Diurnal temperature variation of up to 15 degrees supports phenolic development
• Rainfall ranges from 400mm (valley floor) to 2,000mm (southwest corner)
• Soils include alluvial sandstone, decomposed granite, clay, and sandy loam

French Huguenots founded Franschhoek in 1688, giving the valley its name, meaning 'French Quarter.' The region has produced wine continuously for over 300 years, and today it houses four of South Africa's ten centenarian vineyards. Three Sémillon blocks planted in 1902, 1936, and 1942, plus a fourth from 1905, represent the oldest continuously producing vineyard blocks in the country. The La Colline vineyard, planted in 1936, was established at the unusually high density of 7,000 vines per hectare and includes a 10% component of Sémillon Gris, a rare pink-skinned mutation of the variety.

• Founded by French Huguenots in 1688; name translates to 'French Quarter'
• Four of South Africa's ten centenarian vineyards are located in Franschhoek
• Sémillon blocks from 1902, 1905, 1936, and 1942 are the oldest continuous blocks in South Africa
• La Colline (1936) planted at 7,000 vines per hectare and includes 10% Sémillon Gris

Chardonnay, Sauvignon Blanc, Cabernet Sauvignon, and Shiraz each account for 15% of plantings, making them the most widely grown varieties. Merlot follows at 9%, while Sémillon represents 7% of the total at approximately 86.6 hectares. Chenin Blanc accounts for 5%. Despite its relatively small share by area, Sémillon carries disproportionate prestige due to the age of the vines and Franschhoek's status as the cradle of Sémillon in South Africa. The 'Bo-Hoek' sub-region within the valley has been identified as the optimal terroir for Sémillon production.

• Chardonnay, Sauvignon Blanc, Cabernet Sauvignon, and Shiraz are the most planted varieties at 15% each
• Sémillon covers 86.6 hectares (7% of plantings), with nearly 11 hectares of old-vine blocks
• Bo-Hoek identified as the prime Sémillon sub-region within the valley
• Franschhoek holds more old-vine Sémillon than any other South African region

Old vines develop deep root systems and high skin-to-pulp ratios, producing wines of intense complexity and structure with exceptional aging potential. Franschhoek Sémillon ripens at lower alcohol levels of 10.5 to 12% compared to other coastal regions, while developing richer phenolic profiles. Volcanic exposure at low temperatures without sulfur additions during maturation enhances textural elements in the wines. The style is creamy and barrel-fermented, with mineral complexity, citrus and stone fruit notes, lanolin, beeswax, and distinctive minerality. Cellaring potential extends to five to ten years or more.

• Old vines produce high skin-to-pulp ratios, intensifying complexity and structure
• Sémillon ripens at 10.5-12% alcohol, lower than most coastal South African regions
• Barrel-fermented style with lanolin, beeswax, citrus, stone fruit, and mineral notes
• Cellaring potential of 5-10+ years; volcanic exposure and no sulfur additions during maturation enhance texture