Castle Rock Estate

Reading the rows before the cellar

The season starts in the rows for Robert Diletti, winemaker at Castle Rock Estate in Porongurup. He learned this property first by watching the initial planting as a child, then by returning as a teenager to work among the vines, long before the cellar became his formal station. That early education was followed by 15 years managing other vineyards and by study at Charles Sturt University, but the through-line remains the estate itself: a family property read from the ground up, not from a tasting note backward. Sam Palmer, winemaker here since 2020, works inside that same discipline, where the title carries the weight of place as much as technique. Castle Rock Estate is a small family-operated estate, and its scale matters. The bench is not industrial; the decisions stay close to the fruit, the slopes, and the people who have to stand behind each picking call.

Granite, gravity, and estate fruit

The vineyard sits on a 55-hectare property on the eastern slopes of the Porongurup Range, with 11.2 hectares planted on granite soils and a cool, elevated north-easterly aspect. The winery works across Riesling, Pinot Noir, Chardonnay, Cabernet Sauvignon, Sauvignon Blanc, Shiraz, Grüner Veltliner, Merlot, and Cabernet Franc, with still white, still red, and sparkling wines in the program. Production capacity is 4,500 dozen, enough to give the estate a voice beyond the valley without loosening the hand on the work. The 2-level gravity-flow winery fits the same idea: move fruit with less force, let the season set the terms, and keep the cellar in service to the vineyard. Diletti has put the position plainly: “The wine quality is really determined in the vineyard.” His companion line is just as direct: “I just try to make the wine that portrays the fruit quality.”

A tasting room set above the range

The tasting room sits high on the slope, quiet and full of natural light, with the Stirling Ranges and surrounding valleys held in view beyond the glass. The room is intimate rather than theatrical; conversation has room to happen, and the cellar door keeps the scale of the estate legible. In a winery like this, the view is not decoration. It is the map of the work: the Porongurup Range behind the fruit, the granite under it, the north-easterly aspect giving shape to ripening, the valleys marking the distance between vineyard weather and finished wine.

The estate keeps its measure

Diletti’s Winemaker of the Year recognition in 2015 belongs to a career built through the same property that trained his eye, while Palmer’s tenure since 2020 keeps another set of hands at the cellar’s daily edge. The next measure here is not a gesture outward, but the release of wines that continue to test the site’s clarity, from Riesling and Pinot Noir to Diletti Chardonnay.