Growing Cauliflower in Zone 10B

Cauliflower is the most challenging brassica but produces beautiful heads when conditions are right.

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

• Needs consistent cool temperatures (60-70°F) — very temperature sensitive
• Blanch heads by tying outer leaves over the curd when it’s 2-3 inches
• Any stress (heat, drought, cold snap) can cause buttoning (tiny heads)
• Self-blanching varieties are easier for beginners
• Fall crops are generally more reliable than spring in most zones

Companion Planting

Good companions: beets, celery, onions, spinach

Avoid planting near: tomatoes, peppers, strawberries

Harvest Timeline

55-80 days from transplant

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.