Growing Corn in Zone 10B

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

Zone 10B 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 10B

USDA Hardiness Zone 10B has an average last spring frost around Jan 15 and first fall frost around Dec 31. 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.