Growing Cilantro in Zone 10B

Cilantro is a fast-growing cool-season herb that bolts quickly in heat. Plan for succession planting.

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

• Bolts to seed (coriander) in warm weather — plant in spring and fall
• Succession sow every 2-3 weeks for continuous harvest
• Slow-bolt varieties like ‘Calypso’ extend your harvest
• Let some plants go to seed — coriander is a great spice
• Self-seeds readily if you let it flower

Companion Planting

Good companions: beans, peas, tomatoes, spinach

Avoid planting near: fennel

Harvest Timeline

21-30 days for leaves; 90-100 days for coriander 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.