Growing Corn in Zone 10A

Sweet corn needs space and warm soil but rewards with unbeatable fresh flavor.

Zone 10A has a very long growing season with mild winters. Many crops can be grown nearly year-round with successive plantings.

Top Growing Tips

• Plant in blocks of at least 4 rows for good pollination
• Soil must be 60°F+ for germination
• Heavy feeder — side-dress with nitrogen when plants are knee-high
• Silks turn brown when ears are ready (about 3 weeks after silking)
• Eat or process immediately — sugar converts to starch within hours

Companion Planting

Good companions: beans, squash, cucumbers, melons

Avoid planting near: tomatoes (both are heavy feeders)

Harvest Timeline

60-100 days from seed

About Zone 10A

USDA Hardiness Zone 10A has an average last spring frost around Feb 1 and first fall frost around Dec 20. All planting dates above are calculated from these frost dates. Your specific location may vary — check with your local extension office for the most accurate dates.