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Swansea Frost Dates & Growing Season
Here's the frost forecast for the next three days (last updated on December 8th, 2025 6:09 AM).
Dec 8th
Safe
Dec 9th
Safe
Dec 10th
Safe
Last Frost Date (Spring)
The average last frost date for Swansea is April 15th. We recommend waiting until April 29th before planting tender crops outdoors.
First Frost Date (Autumn)
The average first frost date for Swansea is November 25th.
Growing Season
Based on historical data, the growing season in Swansea is approximately 224 days long.
Swansea Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting.
Swansea Monthly Gardening Guide
February
In February, you can start Geranium indoors, start Celery indoors, start Petunia indoors, start Tomato indoors, and start Thyme indoors.
March
In March, you can sow Pea outside, sow Sorrel outside, start Sage indoors, start Basil indoors, and sow Crimson Clover outside.
April
In April, you can sow Corn outside, sow Runner Bean outside, sow Dill outside, sow Hyssop outside, and sow Calendula outside.