Until now it has been sold as a red blend, but from the 2021 vintage it will be Cabernet Sauvignon from the winery's own vineyards just south of Stags Leap and select vineyards in Napa Valley.
This wine showcases the richness and vibrancy of Napa Valley.
The TD-9 is named after the first tractor that John taught himself to operate as part of setting up the winery in 1973.
In 1972, the late John Shafer gave up a glamorous career in publishing to found the winery in the hillside neighborhood of Napa Valley's Stags Leap District.
John, who knew nothing about winemaking, began by reading every book on winemaking he could get his hands on in order to create his ideal wine.
Later, the eldest son, Doug Schafer, who studied oenology, and Elias Fernandez, who is now a talented winemaker, joined the company, and the quality of the wines has become unwavering.
It is also known as the first winery in Napa Valley to run its entire electricity supply through 100% solar power, and has been an early adopter of environmentally friendly winemaking in both cultivation and brewing.
The taste is what is called modern style.
The complex and rich flavor is supported by the cool climate of the Stags Leap District, brought about by fog and cold sea breezes.
The quality of the wines has been improving in recent years, with the Syrah-based wine "Relentless" taking the top spot in Wine Spectator magazine's "World's 100 Best Wines."
Without a doubt one of Napa's most successful wineries.
Due to the impact of the wildfires, the 2020 vintage was not brewed or sold, so 2021 is a much-anticipated vintage.
In 2022, the winery became a subsidiary of Korean company Shinsegae Property, but Doug Shafer and head winemaker Elias Fernandez will remain at the winery and continue to focus on producing the best wines.