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Dover Frost Dates & Growing Season
Here's the frost forecast for the next three days (last updated on December 8th, 2025 6:04 AM).
Dec 8th
Safe
Dec 9th
Safe
Dec 10th
Safe
Last Frost Date (Spring)
The average last frost date for Dover is April 1st. We recommend waiting until April 15th before planting tender crops outdoors.
First Frost Date (Autumn)
The average first frost date for Dover is December 1st.
Growing Season
Based on historical data, the growing season in Dover is approximately 244 days long.
Dover Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting.
Dover Monthly Gardening Guide
January
In January, you can start Rosemary indoors, start French Lavender indoors, start Onion indoors, start Begonia indoors, and start Leek indoors.
February
In February, you can start Coneflower indoors, start Black Eyed Susan indoors, start White Sage indoors, start Tomatillo indoors, and start Brussel Sprout indoors.
March
In March, you can sow Arugula outside, sow Milk Thistle outside, sow Bok Choy outside, start Cantaloupe indoors, and sow Alyssum outside.
April
In April, you can sow Zinnia outside, sow Zucchini outside, sow Lemon Balm outside, sow Chia outside, and sow Lima Bean outside.