Growing Sweet Corn in Zone 10a

Your planting timeline

1. Direct sowonce soil warms, around January 30
2. Harvestabout 60–100 days days from transplant

Best varieties for zone 10a

Grow heat-tolerant supersweet hybrids in the cooler shoulder seasons (fall and late winter) to dodge midsummer heat that disrupts kernel set.

Growing notes

Sweet corn needs steady, even moisture — about 1 to 1.5 inches of water per week — and is especially thirsty during two windows: when it's putting up tall growth, and from tasseling through ear fill. Water deeply at the base rather than overhead to keep the foliage dry and reduce disease, soaking the root zone two or three times a week rather than a daily sprinkle. Drought stress at pollination causes missing kernels and stunted ears, the most common cause of a poor harvest. Mulch around the block to hold moisture and even out the supply. In sandy soil that drains fast, water more often; in heavy clay, water deeply but less frequently to avoid waterlogging.