Can You Grow Blueberries in California?
The Verdict: Busted. You absolutely can grow blueberries in California, including in Santa Cruz County. You just need the right varieties and some soil preparation.
Why People Believe This
Blueberries are associated with the Southeast and Pacific Northwest, where acidic soils and summer rain create ideal conditions. California's alkaline soils, dry summers, and Mediterranean climate seem like the opposite of blueberry country. Gardeners who have tried and failed (usually by planting the wrong variety or skipping soil acidification) spread the word that it cannot be done.
What the Research Says
UC ANR's small fruit production guidelines confirm that southern highbush blueberry varieties perform well in California's mild-winter regions. These varieties need fewer chill hours (200 to 500 hours below 45F) than their northern highbush cousins, making them well-suited to our coastal climate. UC Cooperative Extension trials in the Central Coast region have shown good production from low-chill varieties. 'Misty' (150-300 chill hours) and 'Sunshine Blue' (150 chill hours) are the safest picks for Zone 10 gardens. 'O'Neal' (400-500 chill hours) performs well in Zone 9 but may underperform in the warmest microclimates. For a third variety, try 'Jewel' or 'Emerald,' both bred for low-chill Southern conditions.
The key challenge in California is soil pH, not climate. Blueberries need a pH between 4.5 and 5.5, and most California soils sit around 7.0 or higher. UC Master Gardeners recommend growing blueberries in containers or raised beds filled with acidic potting mix (peat-based or a mix formulated for azaleas). Santa Cruz's coastal zone is actually an advantage: our cool, foggy summers reduce water stress, and winter temperatures rarely drop below freezing, which southern highbush varieties prefer.
What to Do Instead
Plant southern highbush varieties in containers or dedicated acidic beds. Use a 50/50 mix of peat moss and perlite, or an azalea/camellia potting mix. Acidify irrigation water with a small amount of white vinegar (1 tablespoon per gallon) or use sulfur to maintain pH below 5.5. Plant at least two varieties for better cross-pollination. In Santa Cruz, blueberries do well in part shade (4 to 6 hours of sun), especially on the coast where fog keeps temperatures mild. Water consistently through the dry season, as blueberries need even moisture.
This week: Pick up two southern highbush blueberry varieties (try 'Misty' and 'Sunshine Blue') and plant them in half-barrels with acidic potting mix. You will have berries by next summer.
For more on growing fruit in California, check out our free California Garden Planning Guide at Your Garden Toolkit.
