San Diego County holds a unique title in American agriculture that surprises most people outside our region. While large-scale industrial farming dominates the public imagination, San Diego actually leads the entire United States in the concentration of small farms.

Operating a family grove under ten acres places us right at the heart of this regional tradition. Here is a look at what makes small-scale farming in San Diego so distinct, and why expanding our horticultural education through the UC Master Gardener program is our next major milestone.

The Small Farm Capital of the United States

According to the USDA and local agricultural extension data, an agricultural operation classified as a “small farm” typically encompasses ten acres or fewer. In San Diego County, high land values, rugged microclimates, and rolling topography have created an environment where smaller, specialized boutique farms thrive rather than massive monoculture operations.

From specialty subtropical fruits like avocados and citrus to cut flowers and nurseries, small farms form the backbone of our local agricultural economy. Being part of this network means managing every single tree with hands-on attention, carefully monitoring water distribution, and maintaining healthy soil biology across steep terrain.

Why Micro-Farming Works for California Avocados

Growing avocados on a smaller footprint requires precision management. Because we cannot rely on the sheer volume of hundred-acre commercial flatlands, every single input must be accounted for:

• Irrigation Efficiency: Dialing in micro-sprinklers and calculating seasonal evapotranspiration rates to avoid water waste while preventing root stress.
• Canopy Management: Selective pruning to keep trees accessible for hand-picking while ensuring sunlight penetrates the inner canopy.
• Soil Nutrition and Mulching: Retaining natural leaf litter on the grove floor to build organic matter and protect shallow feeder roots from extreme heat.

Stepping Into the UC Master Gardener Program

Farming is an ongoing education. Even with generations of hands-on grove experience, understanding the deeper science behind plant pathology, integrated pest management, and soil chemistry makes a huge difference in long-term orchard sustainability.

I recently submitted my application for the San Diego County UC Master Gardener program. This program, supported by the University of California Agriculture and Natural Resources division, trains volunteers to extend research-based horticultural practices throughout the community. Becoming a Master Gardener will allow us to test new sustainable practices directly in our grove and translate those scientific insights into clear, actionable guides for home growers and orchardists alike.

Looking Ahead

Small farms represent resilience, community connection, and stewardship of the land. As we continue managing our grove through every season, we look forward to sharing more specialized knowledge on pruning, watering cycles, and tree recovery.

If you want to dial in your own orchard watering schedule based on real-time weather and tree age, explore our free online irrigation calculator to get started.