From the Fields: Stephen Vasquez, Tulare County Certified Crop Adviser 

By Stephen Vasquez
Tulare County Certified Crop Adviser 

California’s pistachio growers just wrapped up another record-breaking harvest, with yields estimated at 1.5 billion pounds. As bearing acreage continues to expand over the next four years, the U.S. is poised to maintain its position as the world’s leading pistachio producer, with more billion-pound harvests expected in the coming seasons.

Despite the impressive numbers, the 2025 harvest wasn’t without its challenges. Mid-September rains temporarily stalled or halted harvest operations in orchards where saturated soils made it impossible for equipment to re-enter. The moisture also accelerated hull breakdown and increased shell staining, which in turn led to increased insect damage. By mid-October, harvest operations had concluded, and processors began handling the 2025 crop.

With the current season behind them, growers’ focus has shifted to preparations for the 2026 crop. Growers are now meeting with their Certified Crop Advisers to plan postharvest and spring nutrition programs. Although pistachios are relatively tolerant of saline soils, ongoing salinity monitoring through annual soil analysis remains critical. Many growers are benefiting from winter rains that help move soil amendments like gypsum into the soil, which helps displace root zone salinity.

CCAs are also assisting growers in developing nitrogen management plans to comply with the Irrigated Lands Regulatory Program, which emphasizes reducing nitrate levels in groundwater. As the only agricultural professionals authorized to certify NMPs and train growers for self-certification, CCAs play a vital role in ensuring regulatory compliance. 

Pistachios are an alternate-bearing crop, meaning yields can fluctuate significantly from year to year. With 2026 expected to be a lower-yielding season, growers are adjusting their input estimates accordingly. After facing steep input cost increases over the past two to three years, many are carefully evaluating their budgets to ensure efficient purchasing.

Over the next three months, two key factors will be top of mind for California pistachio growers: statewide precipitation and fuel prices. Both have a direct impact on production costs and will influence critical decisions as preparations for the 2026 season continue.

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