201: Morgan Twain-Peterson - Bedrock Wine Co.
Inside Winemaking - the art and science of growing grapes and crafting wine
Release Date: 07/22/2025
219: Elias Fernandez - Shafer Vineyards
Inside Winemaking - the art and science of growing grapes and crafting wine
This episode features a conversation with Elias Fernandez, longtime winemaker at Shafer Vineyards in Napa Valley. Fernandez, who was raised by migrant farm workers in the Napa Valley, traces his path from studying enology at UC Davis to joining Shafer in 1984, where he became winemaker in 1994. He discusses the winery's evolution under John and Doug Shafer, its shift toward estate-only vineyards with additions like Wildfoote and Altimeter, and the current portfolio, including Hillside Select, TD-9, the One Point Five, and the Wine Spectator–acclaimed Relentless Syrah. The conversation also...
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218: The Barrel Management Episode
Inside Winemaking - the art and science of growing grapes and crafting wine
In this solo episode of Inside Winemaking, Jim tackles one of the questions he gets most often: how to manage empty barrels. Working through the full lifecycle of a barrel, Jim covers receiving and inspecting new barrels on arrival, keeping them hydrated before harvest (his go-to: shrink-wrap them tight and lock the moisture in), and recovering barrels that have dried out. He walks through swelling and leak-testing before filling, the realities of finding and repairing leaks with spiles, and smart practices for stacking, filling, and leaving proper ullage for young wines still off-gassing CO2....
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217: Alison Rodriguez - Silverado Vineyards
Inside Winemaking - the art and science of growing grapes and crafting wine
Recorded high above the valley floor in Silverado’s Stags Leap estate, this episode with winemaker Alison Rodriguez dives into both Napa viticulture and her global winemaking journey. Alison unpacks the 2025 growing season—early bud break, late rains, and the shadow of El Niño—while describing the constant tension between picking early for safety and waiting for full ripeness in a fire-prone era. She explains what it means to farm 325 acres of 100% estate vineyards, how early-season decisions set up harvest success, and how she manages tannin and extraction in small-berry hillside...
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216: Meredith Sarboraria - Livermore Valley and Valle de Guadalupe
Inside Winemaking - the art and science of growing grapes and crafting wine
This episode features Livermore Valley winemaker and consultant Meredith Sarboraria for a wide-ranging conversation recorded on location in the heart of the appellation. A proud self-described "Livermoron," Meredith traces her path from tasting room work in the late 1990s to earning her Viticulture and Enology degree at Las Positas College and building her consulting business, Barrel Down Wine Services. Along the way, she paints a vivid portrait of Livermore's wine country — from the outsized influence of Wente and Measure D on land preservation, to the region's sandy loam soils,...
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215: Elizabeth Vianna - Chimney Rock Winery
Inside Winemaking - the art and science of growing grapes and crafting wine
In this episode Jim Duane sits down with Elizabeth Vianna to explore her unconventional path from pre-med student to one of Napa Valley’s most respected Cabernet Sauvignon producers. Elizabeth shares how a late discovery of wine in New York City led her to University of California, Davis, and ultimately to a long-term career rooted in estate winemaking in the Stags Leap District. The conversation dives into the evolution of Chimney Rock’s vineyard and winemaking philosophy, including its commitment to 100% estate fruit, the use of exclusively free-run wine, and the influence of site...
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214: Patrick Riggs - Jack Neal & Son Vineyard Managment
Inside Winemaking - the art and science of growing grapes and crafting wine
In this episode, viticulturist Patrick Riggs dives deep into the realities of organic farming in Napa Valley. We unpack what it takes to convert vineyards from conventional to organic, from soil testing and rethinking fertilizer programs to choosing equipment for under‑vine weed control and managing more volatile, season‑driven budgets. Patrick explains how tools and machinery for cultivation have evolved, how he approaches weed control without herbicides, and why organic systems demand a more diagnostic, problem‑solving mindset. Patrick also details integrated strategies for managing...
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213: James Molesworth - Wine Spectator
Inside Winemaking - the art and science of growing grapes and crafting wine
This Jim sits down with James Molesworth, Senior Editor for The Wine Spectator, to trace James’s unconventional path into wine—from a Francophile, academic household in Queens to blind-tasting Burgundy in a tiny West Village cellar, and eventually orchestrating tastings and writing for one of the most influential wine publications in the world. James reflects on formative mentors, the discipline and humility required to learn both tasting and journalism at a professional level, and how his anthropology background shaped his “observe and report” style of wine writing. He also unpacks...
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212: Matteo Abreu - David Abreu Vineyard Management
Inside Winemaking - the art and science of growing grapes and crafting wine
In this episode of Inside Winemaking, Jim Duane sits down with Matteo Abreu, fifth-generation Napa Valley farmer and part of the Abreu vineyard management family, to explore what it means to grow and farm at the highest level in one of the world’s most demanding wine regions. Matteo shares his path into the family business, the realities of multi-generational vineyard management, and how Abreu approaches vineyard site selection, soil preparation, drainage, and long-term vineyard design. The conversation highlights the importance of matching the right varieties to the right sites, with a...
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211: Heat and Cold Stabilization of wines with Leigh Meyering from MyEnologist
Inside Winemaking - the art and science of growing grapes and crafting wine
In this episode of Inside Winemaking, Jim Duane speaks with Leigh Meyering of MyEnologist about the practical and analytical aspects of heat and cold stability in wine. The discussion focuses on how and why protein haze and tartrate instability occur, with an emphasis on white and rosé wines. Leigh explains the principles behind heat stability testing, protein denaturation, and the use of bentonite to prevent haze, as well as how stability concerns differ between red wines and lighter-colored styles. The conversation also addresses the sensory and chemical impacts of stabilization decisions,...
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210: Tommaso Martignon - Seve Consulting
Inside Winemaking - the art and science of growing grapes and crafting wine
This episode features Tommaso, a vineyard consultant whose career spans from Venice and Montalcino to Burgundy, Bordeaux, and other renowned wine regions. Tommaso discusses his background in viticulture, the technical aspects of working in different European vineyards, and how he manages various grape varieties and regional challenges. The conversation highlights real-world issues such as vineyard management, adapting to climate change, and the critical decisions involved in harvest timing and vine care. A significant part of the discussion focuses on the curretage technique, a method for...
info_outlineJoin us this week to hear from Morgan Twain-Peterson, Master of Wine, owner and winemaker at Bedrock Wine Co. Influenced by his father, the founder of Ravenswood Winery, Morgan's path is enriched by his experiences in the European vineyards. Listen in for innovative methods in sustainable viticulture, including sap testing for vine nutrient needs and the role of regenerative agriculture. Explore the contrasts between the Master of Wine and Master Sommelier certifications and discover the power of mentorship in the industry.
Morgan also offers insights into managing California's historic vineyards, reshaping the perception of Zinfandel, and enhancing vineyard soil health with advanced techniques. The conversation concludes with a celebration of the community spirit among Sonoma winemakers and the evolving landscape of winemaking that seamlessly blends tradition with innovation.
Winemaking Class Offers and Show Notes for all episodes at https://www.insidewinemaking.com/
Resources from this Episode
Bedrock Wine Co.: https://bedrockwineco.com/
Bedrock Wine Conversations Podcast: https://bedrockwineco.com/the-study/podcast/
This episode is sponsored by the Vineyard Underground Podcast hosted by leading viticulturist and vineyard education expert, Fritz Westover: https://www.vineyardundergroundpodcast.com/
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Episode Credits
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