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Boston Frost Dates & Growing Season
Here's the frost forecast for the next three days (last updated on December 8th, 2025 6:00 AM).
Dec 8th
Safe
Dec 9th
Safe
Dec 10th
Safe
Last Frost Date (Spring)
The average last frost date for Boston is April 20th. We recommend waiting until May 4th before planting tender crops outdoors.
First Frost Date (Autumn)
The average first frost date for Boston is November 20th.
Growing Season
Based on historical data, the growing season in Boston is approximately 214 days long.
Boston Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting.
Boston Monthly Gardening Guide
February
In February, you can start Rosemary indoors, start Tomatillo indoors, start Celery indoors, start White Sage indoors, and start Begonia indoors.
March
In March, you can sow Radish outside, start Basil indoors, sow Pea outside, start Cantaloupe indoors, and sow Chervil outside.
April
In April, you can sow Anise outside, sow Zucchini outside, sow Runner Bean outside, sow Fenugreek outside, and sow Lemon Balm outside.
May
In May, you can sow Black Bean outside, sow Lima Bean outside, sow Melon outside, sow Watermelon outside, and sow Jute outside.