In this episode of Trellis Talks, Caleb Mosley sits down with Dr. James Stamp, founder of Stamp Associates Viticulture and a leading expert on grapevine nursery quality. They discuss the evolving challenges and opportunities in grapevine plant material, including the impacts of nursery consolidation, vineyard fallowing, and the persistent threat of red blotch disease. Dr. Stamp emphasizes the critical importance of starting with clean, high-quality plant material and the need for improved nursery practices, including the potential for greenhouse-grown propagation and new technologies to enhance plant health and vineyard success.

The conversation also touches on the decline of two major nurseries, Duarte and Wonderful, and what that means for future vine availability. Dr. Stamp shares insights on alternatives like green grafting, Uber vines, and the importance of collaboration among growers to address vineyard replanting and virus management. Despite current challenges, both Stamp and Mosley express optimism that this transitional period presents an opportunity to elevate the standards and innovation within the grapevine nursery sector, ultimately strengthening the foundation of Napa Valley vineyards.

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In this special episode of Grown in Napa Valley, host Caleb Mosley visits Ridge Monte Bello to sit down with two influential voices in California wine: Paul Draper and David Gates. Draper reflects on the collaborative tasting culture and experimental spirit that defined his winemaking career, including Napa’s role in his legendary 1971 Eisele Vineyard Cabernet. Gates shares insights on mountain viticulture, Napa's evolution in the 1980s, and the long-term conservation efforts that helped preserve agriculture on Monte Bello Ridge. Together, their stories highlight the enduring power of mentorship, land stewardship, and wines of place. 

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In this episode of Trellis Talks, host Caleb Mosley reconnects with phenolics researcher James Campbell, now based in Napa Valley and leading a lab focused on vineyard and wine phenolic analysis. Their conversation explores the science behind phenolic development in wine grapes, from early-stage flavonol formation to anthocyanin synthesis and degradation. James emphasizes the importance of early-season practices—like precise leafing and light management—and shares findings from multi-year studies on the effects of heat and irrigation on phenolic preservation. One key insight is that applying moderate irrigation during mid-ripening heat waves can mitigate anthocyanin loss, but late-season interventions are often too late to make a difference.

The discussion also touches on the nuanced interplay of variety, environment, and stress, noting that different grape cultivars respond uniquely to heat. James shares that Cabernet Sauvignon shows higher resilience compared to varieties like Sangiovese. The episode concludes with a look into James’s new venture, Integrated Phenolics, which offers rapid, in-depth phenolic assays for growers and winemakers. His goal is to equip producers with actionable data to make informed decisions during maceration and fermentation, ultimately supporting the continued excellence of Napa Valley wines in a changing climate.

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In this episode of Grown in Napa Valley, NVG celebrates its 50th Anniversary by honoring two influential figures who shaped—and continue to shape—Napa Valley’s viticultural legacy. The episode begins with a rich conversation with Andy Beckstoffer, one of NVG’s founders, who shares the story behind the organization's creation and the pivotal moments that helped elevate grape growers from second-class status to key decision-makers in the wine industry. From advocating for the 75% appellation rule to establishing vineyard-designate branding, Beckstoffer reflects on the early battles for grower respect, the transition from commodity farming to quality-driven practices, and how the region found confidence in its own identity following the 1976 Judgment of Paris.

Then, we share a glass with the 2025 Grower of the Year Oscar Renteria, who reflects on his upbringing in a multi-generational farmworker family and his journey toward leading Renteria Vineyard Management. Oscar speaks with heartfelt optimism about resilience, legacy, and mentorship, emphasizing the importance of education, cultural pride, and finding joy in hard work. His leadership style—rooted in gratitude, empathy, and teamwork—embodies NVG’s mission and offers a forward-looking perspective for the next generation of Napa growers navigating uncertain times with hope and purpose.

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In this episode of Grown in Napa Valley, host Caleb Mosley dives deep into the roots of sustainability and stewardship, chatting with two visionary leaders who have helped shape Napa Valley’s farming future. 

Our first guest is Ted Hall of Long Meadow Ranch, whose passion for organic farming runs deep. He brings us stories from his early days in agriculture and explains how thoughtful practices and long-term thinking can transform not just vineyards, but entire ecosystems. 

Then, we share a glass with Michael Silacci of Opus One, whose deep curiosity and creative spirit shine through in every vintage. Michael walks us through the challenges of the 2022 harvest, the importance of storytelling in wine, and how caring for the land—from vineyard rows to surrounding forests—can shape a more resilient future for Napa Valley. 

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In this episode of Grown in Napa Valley, host Caleb Mosley sits down with two influential women in the Napa Valley wine industry, both leading their own successful businesses. 

First, Dr. Kris Lowe, owner of Vine Balance Consulting and a leader in vineyard research funding, discusses the vital role of research in combating vineyard diseases like Pierce’s disease and red blotch. She also explains the upcoming PDGWIS Board funding referendum and why grower participation is essential for Napa Valley’s future. 

Next, Caleb chats with Brittany Pederson, founder of Vintuition, a viticulture consulting company. Brittany shares her career journey, insights into vineyard management, and the challenges and opportunities of being a woman in the wine industry. As they chat, they enjoy a glass of 2015 Phifer Pavitt Cabernet Sauvignon Date Night. 

Join us for an engaging conversation filled with expertise, personal stories, and a shared passion for Napa Valley’s grape-growing community. 

RESOURCES:

California Department of Food and Agriculture 

National Academies 

NVG ROOTSTOCK: New Research and Trends with Marc Fuchs 

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Welcome to Trellis Talks, a new mini-series from Grown in Napa Valley, where we dive into the technical side of vineyard management in bite-sized episodes. In this installment, host Caleb Mosley sits down with Thibaut Scholasch of Fruition Sciences to explore the science of vineyard water management. From irrigation timing to the long-term impact of early-season decisions, they discuss how to optimize vine resilience and ripening in an unpredictable climate. Whether you're a grower, winemaker, or vineyard enthusiast, this quick but insightful conversation will help you rethink how water shapes the future of Napa Valley wines.

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In this episode of Grown in Napa Valley, host Caleb Mosley steps out into the vineyards to explore the art and science of pruning. He speaks with esteemed vineyard professional Anulfo Solorio from Silverado Farming Company about the upcoming Napa County Pruning Contest, highlighting the importance of education and precision in vineyard management. Solorio shares his deep appreciation for pruning as a craft, emphasizing how it shapes the future of the vine and contributes to overall vineyard health. 

Later, Mosley meets with international pruning expert Jacopo Miolo from Simonit&Sirch, who provides insight into how viticultural practices vary worldwide and the importance of adapting techniques to local terroirs. Their discussion underscores the need to move beyond rigid pruning formulas and instead cultivate an approach that respects the vineyard’s unique climate, soil, and history. 

The episode concludes with a sit-down conversation with John Truchard, who shares his journey from grape growing to winemaking and his impact on Napa’s music scene. Truchard discusses the success of JAM Cellars, the evolution of vineyard leasing, and the business strategies behind building a scalable and accessible wine brand. While we chat, we enjoy a glass of 2024 John Anthony Church Vineyard Sauvignon Blanc.

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In this episode of Grown in Napa Valley, Executive Director and host Caleb Mosley celebrates the Napa Valley Grapegrowers' 50th anniversary with two in-depth conversations highlighting the region's rich history, agricultural legacy, and future challenges.

The episode begins with Richard Mendelson, a renowned wine lawyer, author, and historian. Richard discusses the pivotal moments that shaped Napa Valley, from the 19th-century wine pioneers to the post-Prohibition revival and the creation of the Agricultural Preserve in 1968. He emphasizes the critical role of human influence in terroir, the importance of resilience in the face of climate change, and the need to preserve Napa’s agricultural heritage through initiatives like social justice programs for farmworkers and stricter appellation standards. Richard also shares stories from his career, including efforts to protect the Napa Valley name globally and recent AVA developments such as the Crystal Springs AVA.

The conversation continues with Ren Harris, one of the founding members of the Napa Valley Grapegrowers and a celebrated vintner. Ren reflects on his early days in Napa, the region’s shift from prunes to vineyards, and his instrumental role in creating the Napa Valley Grapegrowers organization. He shares stories about his work advocating for farmworker rights, creating health insurance plans for vineyard workers, and establishing marketing orders and appellation rules that shaped Napa’s identity. Ren also discusses the evolution of vineyard practices, his family’s Paradigm Winery, and the significance of preserving Napa’s community spirit and agricultural lands amid climate and economic changes.

This episode is brought to you by Pulido Walker Estate Vineyards. 

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In this episode of Grown in Napa Valley, Executive Director and host Caleb Mosley engages in two thought-provoking conversations that explore the present and future of Napa Valley's wine industry.

Kicking off the episode with Jon Moramarco, managing partner of BW166 and a renowned expert in beverage alcohol trends. Jon shares his journey in the wine industry, insights into seismic shifts in global wine markets, and the challenges facing Napa Valley. Jon highlights the importance of innovation, smarter business practices, and the potential for Napa to explore new opportunities to remain a leader in the global wine industry.

The episode continues with Paul Goldberg, 2024 Grower of the Year and vineyard manager at Bettinelli Vineyards. In this candid conversation, Paul reflects on his Napa upbringing, his journey into viticulture, and the evolution of vineyard practices over the past 50 years. Paul discusses the meticulous farming techniques Bettinelli employs to enhance phenolic development, the importance of adapting to changing market demands, and the opportunities to champion diverse grape varietals. He also shares the story of Sleeping Lady Vineyard and the 2019 Ad Vivum Cabernet Sauvignon he brought.

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