Growing Brussels Sprouts in Zone 3B

Brussels sprouts need a long growing season but frost dramatically improves their flavor.

Zone 3B 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 in spring for fall harvest — they need 80-100 days
• Remove lower leaves as sprouts develop to improve air circulation
• Top the plant 3-4 weeks before expected harvest to speed maturity
• Harvest from bottom up as sprouts reach 1-2 inches
• Flavor is best after several hard frosts

Companion Planting

Good companions: beets, carrots, onions, dill, sage

Avoid planting near: strawberries, tomatoes

Harvest Timeline

80-100 days from transplant

About Zone 3B

USDA Hardiness Zone 3B has an average last spring frost around May 15 and first fall frost around Sep 15. 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.