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Cornwall 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 Cornwall is March 30th. We recommend waiting until April 13th before planting tender crops outdoors.
First Frost Date (Autumn)
The average first frost date for Cornwall is December 5th.
Growing Season
Based on historical data, the growing season in Cornwall is approximately 250 days long.
Cornwall Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting.
Cornwall Monthly Gardening Guide
January
In January, you can start Onion indoors, start Snapdragon indoors, start Artichoke indoors, start Leek indoors, and start Petunia indoors.
February
In February, you can start Stevia indoors, start Tomato indoors, start Brussel Sprout indoors, start Broccoli indoors, and start Cauliflower indoors.
March
In March, you can sow Calendula outside, sow Flax outside, sow Chervil outside, sow Babys Breath outside, and sow Arugula outside.
April
In April, you can sow Pumpkin outside, sow Jute outside, sow Watermelon outside, sow Sesame outside, and sow Mung Bean outside.