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The rare diversity of soils at our estate Margarita Vineyard is something we talk about frequently. It’s part of the fabric of our wines—a point of differentiation that defines our sense of place. And if you can’t get excited about a wine’s sense of place, then you’re missing perhaps the most vital aspect of wine appreciation!
Margarita Vineyard lies along the base of the Santa Lucia Mountains between two fault zones, where ongoing geologic upheaval has blessed the land with a striking mix of soils. Walking around the vineyard, you will find fields of flaky shale, slopes of fine sediment and expanses of calcareous ancient sea bed riddled with oyster fossils. Granitic and volcanic soils are also present.
While we can’t say that the mineral content of a certain soil type fosters a specific flavor (such as blackberry, blueberry, etc.), we do know that soil type has a bearing on the available nutrients and how those nutrients are taken up, as well as moisture retention and root zone development. These and other soil factors do have a significant impact on the resulting fruit and wine, in terms of texture, fruit intensity, flavor profile and tannin profile; and these factors shift as you transition from sedimentary soils to calcareous soils to shale soils.
The differences in the resulting wines are obvious to our winemakers, Mike Sinor and Stewart Cameron. They like to say that the varied soils give them more “colors” to paint with when it comes to assembling final blends, allowing them to build natural complexity and dimension into a single estate-grown wine.
Starting with the 2013 vintage, we are taking these observations to a more experimental level. Mike and Stewart chose fruit from three separate Cabernet Sauvignon blocks rooted in three distinct soil types, all picked at the same ripeness. As Mike explains in the video above, each of these small Paso Robles Cabernet Sauvignon lots is now being made with the same winemaking and aging practices. This will give us a more controlled opportunity to compare the effects of the soils and to share our discoveries with you down the line. Stay tuned!
P.S. If you want to see some of these soils firsthand, including the sea bed with oyster fossils, come out for one of our Paso Robles winery tours.