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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 Thyme indoors, start Lavender indoors, start Oregano indoors, start French Lavender indoors, and start Petunia indoors.
March
In March, you can sow Carrot outside, sow Lettuce outside, start Swamp Milkweed indoors, sow Bok Choy outside, and start Luffa indoors.
April
In April, you can sow Cantaloupe outside, sow Quinoa outside, sow Lemon Balm outside, sow Anise outside, and sow Zinnia outside.
May
In May, you can sow Chia outside, sow Okra outside, sow Butterfly Pea outside, sow Corn outside, and sow Lima Bean outside.