Growing Broccoli in Zone 4A

Broccoli is a cool-season brassica that produces both a main head and smaller side shoots.

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

Top Growing Tips

• Start indoors 6-8 weeks before last frost for spring crop
• Harvest main head before flowers open (when buds are tight)
• After main head is cut, side shoots keep producing for weeks
• Floating row covers protect against cabbage worms
• Fall plantings often produce larger heads than spring

Companion Planting

Good companions: onions, celery, potatoes, dill, chamomile

Avoid planting near: tomatoes, peppers, strawberries

Harvest Timeline

55-80 days from transplant

About Zone 4A

USDA Hardiness Zone 4A has an average last spring frost around May 8 and first fall frost around Sep 25. 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.