Growing Radishes in Zone 4B

Radishes are the fastest crop in the garden — some varieties are ready in under 30 days.

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

• Perfect first crop for kids and beginners
• Sow directly — don’t transplant root crops
• Harvest promptly or they become woody and hot
• Great row marker — plant with slow-germinating carrots
• Fall radishes (daikon) are larger and store better

Companion Planting

Good companions: lettuce, peas, beans, cucumbers

Avoid planting near: hyssop

Harvest Timeline

22-30 days (spring varieties), 50-60 days (winter varieties)

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.