Grazing Sheep in California Vineyards: A Regenerative Agriculture Practice

California vineyards are increasingly adopting innovative regenerative agriculture practices, and integrating sheep grazing is gaining traction as a powerful tool for vineyard management. This approach offers a multitude of benefits, from improved soil health and reduced input costs to enhanced biodiversity. Still, successful implementation requires careful planning and adaptation to specific site conditions.

The Rise of Integrated Sheep Vineyard Systems (ISVS)

Integrating livestock, particularly sheep, into vineyard systems is a key practice in regenerative agriculture. It provides opportunities to build soil health, reduce reliance on synthetic fertilizers and herbicides, and even create recent revenue streams for vineyard owners [1]. California vineyards, covering nearly 1 million acres, are uniquely positioned to benefit from this practice, especially given the state’s ongoing drought and the increasing importance of understory forage [1].

Benefits of Sheep Grazing in Vineyards

• Vegetation Management: Sheep effectively manage vegetation in vineyards, reducing the need for mowing or herbicide application.
• Soil Health Improvement: Grazing can improve soil health by increasing organic matter, enhancing nutrient cycling, and promoting beneficial microbial activity.
• Reduced Input Costs: By reducing the need for mowing and synthetic inputs, sheep grazing can lower operational costs.
• Biodiversity Enhancement: Managed grazing can contribute to increased biodiversity within the vineyard ecosystem.
• Forage Utilization: Vineyards’ understories represent an increasingly important source of forage, particularly during drought conditions [1].

Grazing Strategies and Considerations

There are varying levels of integration when it comes to sheep and vineyards. Research is currently being conducted to compare different approaches:

• Non-Grazed (NG): Traditional vineyard management without livestock integration.
• Integrated Sheep Vineyard Systems with Winter Grazing (ISVS_WG): Sheep graze the vineyard during the winter season.
• Integrated Sheep Vineyard Systems with Extended Winter and Summer Grazing (ISVS_WSG): Sheep graze the vineyard during both winter and summer seasons [1].

Each operation is unique, and land managers should adapt grazing practices to their specific context, goals, and available resources [1]. A new best management practices guide has been developed to facilitate this integration [1] and [2].

Soil Health Outcomes

Research conducted by UC Davis has shown positive soil health outcomes in Northern California coastal vineyards utilizing integrated sheep grazing. The grazing strategies employed are typically high-density and short-duration [4].

Resources for Implementing ISVS

A collaborative effort involving vineyard managers, extension specialists, graziers, and organizations like the Community Alliance with Family Farmers (CAFF) and the Agroecology Lab at UC Davis has resulted in a comprehensive guide for grazing sheep in California vineyards [1]. This guide is designed to help land managers achieve their management, financial, and environmental objectives [1].

Download the guide here: https://caff.org/grazing-sheep-in-california-vineyards/