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Windsor and Maidenhead Frost Dates & Growing Season
Here's the frost forecast for the next three days (last updated on December 8th, 2025 6:05 AM).
Dec 8th
Safe
Dec 9th
Safe
Dec 10th
Safe
Last Frost Date (Spring)
The average last frost date for Windsor and Maidenhead is April 20th. We recommend waiting until May 4th before planting tender crops outdoors.
First Frost Date (Autumn)
The average first frost date for Windsor and Maidenhead is November 20th.
Growing Season
Based on historical data, the growing season in Windsor and Maidenhead is approximately 214 days long.
Windsor and Maidenhead Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting.
Windsor and Maidenhead Monthly Gardening Guide
February
In February, you can start White Sage indoors, start Thyme indoors, start Statice indoors, start Begonia indoors, and start Celery indoors.
March
In March, you can start Pumpkin indoors, sow Flax outside, sow Pea outside, sow Mustard outside, and start Brussel Sprout indoors.
April
In April, you can sow Forget Me Not outside, sow German Chamomile outside, sow Zucchini outside, sow Lemon Balm outside, and sow Hyssop outside.
May
In May, you can sow Lima Bean outside, sow Black Bean outside, sow Sesame outside, sow Jute outside, and sow Chia outside.