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Harborough 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 Harborough is April 25th. We recommend waiting until May 9th before planting tender crops outdoors.
First Frost Date (Autumn)
The average first frost date for Harborough is November 15th.
Growing Season
Based on historical data, the growing season in Harborough is approximately 204 days long.
Harborough Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting.
Harborough Monthly Gardening Guide
February
In February, you can start Ground Cherry indoors, start Begonia indoors, start Oregano indoors, start Statice indoors, and start Artichoke indoors.
March
In March, you can sow Mustard outside, sow Spinach outside, sow Milkweed outside, start Marigold indoors, and sow Bok Choy outside.
April
In April, you can sow Babys Breath outside, sow Fennel outside, sow German Chamomile outside, sow Calendula outside, and sow Gladiolus outside.
May
In May, you can sow Cucumber outside, sow Zinnia outside, sow Zucchini outside, sow Hollyhock outside, and sow Sesame outside.