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Harrow Frost Dates & Growing Season
Here's the frost forecast for the next three days (last updated on December 8th, 2025 6:02 AM).
Dec 8th
Safe
Dec 9th
Safe
Dec 10th
Safe
Last Frost Date (Spring)
The average last frost date for Harrow is April 15th. We recommend waiting until April 29th before planting tender crops outdoors.
First Frost Date (Autumn)
The average first frost date for Harrow is November 25th.
Growing Season
Based on historical data, the growing season in Harrow is approximately 224 days long.
Harrow Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting.
Harrow Monthly Gardening Guide
February
In February, you can start Black Eyed Susan indoors, start Cauliflower indoors, start Oregano indoors, start Pansy indoors, and start Coleus indoors.
March
In March, you can sow Spinach outside, sow Watercress outside, start Luffa indoors, sow Flax outside, and start Cantaloupe indoors.
April
In April, you can sow Butterfly Pea outside, sow Cantaloupe outside, sow Calendula outside, sow Babys Breath outside, and sow Black Bean outside.