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Cardiff 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 Cardiff is April 15th. We recommend waiting until April 29th before planting tender crops outdoors.
First Frost Date (Autumn)
The average first frost date for Cardiff is November 25th.
Growing Season
Based on historical data, the growing season in Cardiff is approximately 224 days long.
Cardiff Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting.
Cardiff Monthly Gardening Guide
February
In February, you can start Ground Cherry indoors, start Petunia indoors, start Snapdragon indoors, start Tomato indoors, and start Pansy indoors.
March
In March, you can sow Mustard outside, start Marigold indoors, sow Bok Choy outside, start Cantaloupe indoors, and sow Pea outside.
April
In April, you can sow Lemon Balm outside, sow Zinnia outside, sow Melon outside, sow Fennel outside, and sow Calendula outside.