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Gwynedd Frost Dates & Growing Season
Here's the frost forecast for the next three days (last updated on December 8th, 2025 6:08 AM).
Dec 8th
Safe
Dec 9th
Safe
Dec 10th
Safe
Last Frost Date (Spring)
The average last frost date for Gwynedd is May 10th. We recommend waiting until May 24th before planting tender crops outdoors.
First Frost Date (Autumn)
The average first frost date for Gwynedd is October 25th.
Growing Season
Based on historical data, the growing season in Gwynedd is approximately 168 days long.
Gwynedd Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting.
Gwynedd Monthly Gardening Guide
March
In March, you can start Black Eyed Susan indoors, start Coleus indoors, start Coneflower indoors, start Celery indoors, and start Swamp Milkweed indoors.
April
In April, you can sow Sweet Pea outside, sow Quinoa outside, sow Lettuce outside, sow Crimson Clover outside, and sow California Poppy outside.
May
In May, you can sow Chia outside, sow Morning Glory outside, sow Lima Bean outside, sow Pumpkin outside, and sow Corn outside.