Growing Spinach in Zone 4B

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

Zone 4B has a short growing season — start seeds indoors when possible and use season-extending techniques like cold frames and row covers.

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 4B

USDA Hardiness Zone 4B has an average last spring frost around May 1 and first fall frost around Oct 1. 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.