Clean Vines, Strong Future: Why Clean Plant Material Matters More Than Ever

Planting a vineyard is one of the most important—and expensive—investments a grower can make. Every decision made at the outset sets the stage for decades of vineyard health, productivity, and economic viability. At Napa Valley Grapegrowers, we believe that choosing clean plant material is a fundamental step in ensuring the long-term success of your vineyard—and protecting the resilience of the entire region.

What Is "Clean Plant Material"?
“Clean” means plant material that is tested and verified to be free of known viral pathogens and damaging pests. That includes both scion wood and rootstock. It also means the nursery has followed rigorous sanitation and propagation protocols to minimize the risk of contamination from viral, bacterial, fungal, or insect vectors.
Diseases like Grapevine Red Blotch Virus (GRBV), Grapevine Leafroll-Associated Viruses (GLRaVs), and fungal trunk pathogens continue to impact vine longevity and grape quality in California. Even vines that appear healthy can harbor pathogens—making certification and testing essential.

Why It Matters: Economics, Environment, and Equity

• Economic: Replanting due to infected vines can cost $25,000–$50,000 per acre and delay full productivity for 3+ years.
• Environmental: Replanting early wastes water, diesel, fertilizers, and soil amendments—all inputs with a carbon footprint.
• Community Impact: Lost revenue can reduce farmworker hours, disrupt contracts, and strain vineyard operations.

Clean material isn't just about vine health. It’s about building resilience into our farms, our businesses, and our shared agricultural landscape.

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