CULLEN Diana Madeline Cabernet Merlot 2020

Robert Parker Score: 95+ points

Reviewer: Erin Larkin — January 2026 Week 429 Jan 2026

Drink 2028–2040

The 2020 Diana Madeline hails from a vintage that perhaps we underestimate its significance, purely by virtue of the fact that we may be too close to it currently. Similar to the World War years, any wine made in 2020 was done so under trying conditions heretofore not experienced by the global community. Widespread lockdowns, the threat of a then-unknown virus weighing down upon us all, uncertainty rife and mobility greatly restricted, the wines of the 2020 vintage are a triumph in themselves. In Margaret River, the season was warm, dry and early, and it has yielded a tranche of structurally powerful wines, as this is. The tannins here feel firm, and they serve to encase the fruit rather than exist within it, as other Diana Madelines exhibit. It is perhaps a wine that needs more time, and it is certainly a historical vintage to collect—if not for us now, then for our children later. 13.1% alcohol, sealed under screw cap.

Cullen Wines supplied the following technical details: The 2020 harvest dates included two moon-opposite-Saturn events and two full moons—one being a fruit day perigee and the other a moon-opposite-Saturn flower day—and took place from February 8 until March 10. The blend is 92% Cabernet Sauvignon, 4% Merlot, 3% Cabernet Franc and 1% Malbec. Closed tanks, open fermenters, barrels and amphora were all used in the fermentation process, and the period of skin contact lasted from 10 to 99 days, depending on the batch of wine. This wine spent 13 months in 50% new oak in a mixture of barriques and puncheons, with some biodynamic oak featuring. No additions of yeast, acid or malolactic acid were made to this wine.