Grape Spotlight: San Marco from Trentino-Alto Adige to the Outer Coastal Plain AVA

San Marco is a Vitis vinifera red wine grape created in 1993 by breeder Marco Stefanini at the Fondazione Edmund Mach in Trentino-Alto Adige. It is a cross of the very popular Trentino-Alto Adige grapes Teroldego × Lagrein in order to create a wine grape that ripens fully in cooler climates; resist botrytis better than its parents; and still produced deeply colored and structured wines. 

In 2011, Larry Coia of Bellview Winery visited the Foundation Edmund Mach and learned about EC02 - the name originally given to this grape. Trentino-Alto Adige experiences hot summers, cold winters, and significant diurnal shifts which are conditions similar to parts of the U.S. East Coast. Thus, through his recommendation,  the following year the Outer Coastal Plain Vineyard Association (OCPVA) imported the grape into the U.S.. Following release from quarantine, the OCPVA trademarked the name as San Marcus and through a petition from Bellview Winery, the TTP approved use of San Marco as a registered grape variety.

The Outer Coastal Plain AVA, established in 2007 and expanded in 2017, stretches across 2.25 million acres of southern and southeastern New Jersey, making it one of the largest and most quietly influential winegrowing regions on the East Coast. The region’s defining feature is its uniform soil profile—well‑drained sandy and sandy‑loam soils derived from ancient coastal sediments, naturally low in fertility and pH, which help control vine vigor and encourage deep rooting. Climatically, the AVA benefits from a 188‑ to 217‑day growing season, moderate rainfall, and the moderating effects of the Atlantic Ocean and Delaware Bay, which reduce frost risk and temper heat spikes.

San Marco thrives in environments with hot summers, cold winters, and when planted in sandy and clay soils. It buds late helping to shield from Spring frost and produces medium sized and loose clusters. It seems more suited for VSP training and shares a similar late-midseason harvest as Cabernet Franc. Although it is resistant to botrytis, it is not resistant to black rot or downy mildew.

Autumn Lake Winery, located in Williamstown, New Jersey, is one of the Outer Coastal Plain AVA producers actively developing and releasing wines from San Marco. I was able to sample their 2021 San Marco at the 2026 Eastern Winery Exposition and was impressed with the dark fruit, structure, and smooth tannins shown by this wine.