THE BRENTWOOD
HARVEST CALENDAR
A comprehensive guide to seasonal produce cycles, varietal succession, and the agricultural heritage of Northern California's Delta region.
The Agricultural Synchrony
The agricultural landscape of Brentwood, California represents a singular intersection of Mediterranean climatology, Deltaic hydrology, and a centennial legacy of family-operated horticulture.
Located at the northeastern edge of Contra Costa County, Brentwood serves as a vital ecological and economic transition zone between the highly urbanized San Francisco Bay Area and the expansive industrial agriculture of the Central Valley.
This region is defined by its unique microclimate, specifically the "Delta Breeze," which facilitates the production of specialty crops—most notably sweet corn, cherries, and stone fruits—that are recognized globally for their exceptional sugar content and structural integrity.
Annual Timeline
A visual overview of the Brentwood agricultural year, showing the ebb and flow of produce availability across all seasons.
The Agricultural Year
The seasonal calendar of Brentwood is not merely a schedule of harvests but a complex, interdependent biological sequence that has evolved over a century of family farming.
The Vernal Transition
spring
The Brentwood agricultural year begins not with the blooming of trees, but with the emergence of the asparagus crop, colloquially known as "grass" in the produce industry. Asparagus represents a significant long-term investment for Brentwood farmers; while it takes three years for a plant to reach harvestable maturity from seed, a well-maintained field can yield for over fifteen years.
The harvest window is remarkably brief, typically spanning from early March to late May, and is highly sensitive to soil temperature. Farmers prioritize varieties like UC 157 for their resistance to Fusarium and their ability to produce uniform spears in the fluctuating temperatures of early spring.
As the asparagus season reaches its midpoint in April, the region transitions into the berry bloom, where strawberries take precedence. Brentwood has become a "U-pick capital" for strawberries, with several family-owned operations utilizing Albion and Chandler varieties known for their high brix levels and firm structure.
Featured Produce
The Cherry Epoch
summer
The most culturally and economically significant phase of the Brentwood seasonal calendar is the cherry harvest, which typically commences in early May. Brentwood's unique position allows its cherry crop to mature several weeks ahead of competing regions in Oregon and Washington, granting local growers a strategic market advantage.
The success of the cherry season is contingent upon the accumulation of "chill hours" (temperatures between 32°F and 45°F) during the winter months, followed by a steady increase in Growing Degree Days (GDD) in April.
The ripening sequence is a highly regulated biological progression. Early varieties like the Brooks and Tulare cherries mature approximately 11 to 14 days before the industry-standard Bing. The mid-season is defined by the arrival of the Bing and the Rainier. The Bing remains the premier commercial cherry due to its dark mahogany skin and dense, crunchy flesh.
Featured Produce
The Summer Apex
summer
As the cherry orchards go dormant for the summer, the focus of Brentwood agriculture shifts to the Delta's most iconic vegetable: sweet corn. The "Brentwood Diamond" brand represents a pinnacle of horticultural craftsmanship developed over three generations.
The genetic classification of Brentwood corn is essential to understanding its quality. While traditional varieties (SU) were known for rapid sugar-to-starch conversion, the modern Brentwood standard is the "supersweet" (SH2) variety. These varieties contain a mutation that triples the sugar content of the kernels and significantly slows the metabolic process that turns sugar into starch after the ear is detached from the stalk.
To further preserve this sweetness, Brentwood growers employ "ice injection" systems—a post-harvest cooling mechanism where a slurry of ice and water is injected into the crates to rapidly drop the core temperature of the corn to 32°F.
Featured Produce
Stone Fruit Succession
summer
Parallel to the corn harvest is the stone fruit succession, a staggered ripening process that ensures continuous availability from May through September. Stone fruit production in Brentwood is characterized by the cultivation of "heirloom" and "high-flavor" varieties that are often too delicate for the national supply chain.
The peach harvest is divided into white and yellow varieties, as well as clingstone and freestone types. Perhaps the most sought-after stone fruit in the Brentwood calendar is the Blenheim Royal apricot. Considered an endangered variety in California agriculture, the Blenheim thrives in the Brentwood microclimate. Its season is exceptionally short, lasting only two to three weeks in June.
Featured Produce
The Autumnal Shift
fall
As the extreme heat of mid-summer wanes in late August, the Brentwood harvest shifts toward warm-season vegetables and the first pome fruits. The region has cultivated a reputation for heirloom tomatoes, a category led by the Smith Family Farm since the 1980s.
Unlike commercial hybrids, these tomatoes are selected for genetic traits like thin skin and high acidity, which are incompatible with long-distance shipping but provide a superior culinary experience. Over a dozen varieties of heirloom tomatoes are typically available simultaneously at the peak of the season in September.
The pome fruit harvest, including apples and pears, begins in late July with Gala apples and Bartlett pears, extending through October with later varieties like Fuji and Granny Smith.
Featured Produce
Winter Resilience
winter
While the U-pick orchards typically close following the pumpkin harvest in October, the agricultural cycle in Brentwood continues through the winter months. This period is dominated by citrus, persimmons, and pomegranates, which benefit from the cooler temperatures of the "dormant" season.
Citrus provides a "bridge" between the harvest years. From November through May, Brentwood orchards produce a variety of citrus, including Navel oranges, Cara Cara oranges, and various mandarins. The cooling temperatures of winter are actually beneficial for citrus; chilly nights trigger the increase of the fruit's natural sugar content, a process that makes the winter harvest far superior in flavor to citrus grown in tropical climates.
Featured Produce
Economic Impact
Brentwood's agricultural economy has successfully pivoted from wholesale to direct-to-consumer ag-tourism, capturing premium value while educating the public on local food systems.
Total Market Value
$93,429,000
Resilience of specialty crops despite challenges
Number of Farms
405
Consolidating into legacy family operations
Average Farm Size
516 Acres
Shift toward mid-size operations
Organic Acreage
1,390 Acres
Consumer demand for sustainability
Harvested Cropland
26,729 Acres
Prevention of urban sprawl on agricultural land
Data from the 2022 Census of Agriculture for Contra Costa County. The region continues to demonstrate resilience through specialty crop production and ag-tourism innovation.