Growing Spinach in Zone 10B

Spinach is a nutrient-dense cool-season green that grows fast in spring and fall.

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 as early as soil can be worked (tolerates light frost)
• Bolts in long days and heat — time plantings carefully
• Fall plantings often produce better than spring
• Keep soil consistently moist for tender leaves
• Malabar spinach is a heat-tolerant alternative for summer

Companion Planting

Good companions: strawberries, peas, beans, brassicas

Avoid planting near: none in particular

Harvest Timeline

35-45 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.