When to Plant in Boston, MA

Boston's harbor location gives it a slightly milder climate than inland Massachusetts — Zone 6b with a typical last frost around April 22. The ocean moderates winter temperatures, and Boston's urban heat island extends the growing season compared to the suburbs.

Boston gardeners work with roughly 185 frost-free days. Community garden plots are highly sought-after in the city. The cool, humid climate is excellent for spring and fall growing, and a productive summer season with proper warm-season varieties.

FAQ

When is the last frost date in Boston, MA?

Boston's average last frost date is around April 22. The harbor location and urban heat island can sometimes allow planting a week earlier than surrounding suburban areas.

What grows best in Boston?

Cool-season crops thrive in spring and fall: peas, lettuce, spinach, broccoli, and kale. Tomatoes, peppers, and squash produce well through summer with proper variety selection.

When should I plant tomatoes in Boston?

Start seeds indoors in late March. Transplant outdoors after April 22. Choose early-maturing varieties (65–75 days) for reliable harvest before October frosts.

How does Plan My Garden help Boston gardeners?

Enter your Boston zip code for exact planting dates tuned to the Massachusetts coast's growing calendar.

Frost dates for Boston ZIP codes

Other city guides in Massachusetts

Published crop guides