Los Angeles, CA

Los Angeles sits in USDA zone 10b with winter lows between 35 and 40°F, meaning frost is a non-event. The last spring frost occurs around December 31, and the first fall frost around December 28, leaving a 365-day growing season. This year-round potential is the defining feature and the primary advantage over most of the country.

Yet continuous planting throughout the year comes with a tradeoff: summer heat dominates the calendar more than season length. Mediterranean climates experience intense solar radiation and daytime highs regularly exceeding 90°F (sometimes 100°F+) from June through August. At these temperatures, many crops that thrive in spring and fall falter. Tomatoes stop setting fruit. Basil bolts rapidly. Even heat-loving peppers may drop flowers if nighttime temperatures don't drop below 75°F.

Figs, by contrast, flourish in this heat and rarely experience the stress that limits them elsewhere. Peppers, eggplant, and sweet potatoes are near-ideal matches. The practical gardening window for cool-season crops (brassicas, lettuce, peas) shifts to fall through spring, when daytime temperatures stay moderate and frost is not a constraint. Water availability, not frost risk, is the binding resource.

Summer heat stress is the dominant challenge. From mid-June through August, daytime temperatures regularly exceed 90°F and sometimes reach 110°F+. Tomatoes stop setting fruit above 95°F; peppers may drop flowers despite warm nighttime temperatures if humidity is low. Basil transitions from productive to bolting in weeks. Afternoon sun exposure can cause sunburn on fruit left unshaded.

Water scarcity compounds the problem. Southern California faces recurring drought, and many municipalities impose irrigation restrictions during summer months. Heavy mulching and drip irrigation become essential, not optional. Plants stressed by heat also become more susceptible to spider mites and whiteflies, pests that explode in warm, dry conditions.

Alkaline soil is a third common friction point. LA basin soils commonly range from pH 7.5 to 8.5, which can lock up iron and other micronutrients. Blueberries and rhododendrons struggle with this alkalinity. Peppers and tomatoes tolerate it reasonably well, though nutrient deficiency symptoms may appear.

Embrace heat-loving crops and abandon frost-fear. Figs, peppers (all varieties), eggplant, sweet potato, and rosemary thrive in the intense summer sun that limits most of the country. Tomatoes and basil grow well in spring and fall, when heat stress is lower. Choosing crop-to-season matches eliminates the stress of fighting against the climate.

Plant cool-season crops on the fall/winter calendar. Since frost is not a constraint, the limiting season for lettuce, brassicas, and root crops is actually available from September through May. Succession-planting every two weeks from September through November yields continuous fall and winter harvest. This inverts the usual gardening calendar and requires tracking local heat, not frost.

Provide afternoon shade and consistent water for summer tomatoes. If summer tomato harvests are desired, choose early-maturing varieties planted in late February or early March, then provide 20 to 40% afternoon shade (shade cloth or tree canopy) during peak heat. Consistent drip irrigation with 2 to 3 inches of mulch underneath prevents stress cracking and fruit drop.