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Greenwich Frost Dates & Growing Season
Here's the frost forecast for the next three days (last updated on January 13th, 2026 12:02 AM). You can also use the My Cozy Plant app for faster frost warnings and alerts in your postal code.
Jan 13th
Safe
Jan 14th
Radiation Frost (Clear skies froze leaves)
Jan 15th
Safe
Last Frost Date (Spring)
The average last frost date for Greenwich is April 1st. We recommend waiting until April 15th before planting tender crops outdoors.
First Frost Date (Autumn)
The average first frost date for Greenwich is December 1st.
Growing Season
Based on historical data, the growing season in Greenwich is approximately 244 days long.
Greenwich Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting.
Greenwich Monthly Gardening Guide
January
In January, you can start Celery indoors, start French Lavender indoors, start Leek indoors, start Geranium indoors, and start Snapdragon indoors.
February
In February, you can start Basil indoors, start Cauliflower indoors, sow Pea outside, start Tomatillo indoors, and start Thyme indoors.
March
In March, you can sow Fennel outside, start Cantaloupe indoors, sow Milkweed outside, sow Alfalfa outside, and sow German Chamomile outside.
April
In April, you can sow Black Bean outside, sow Mung Bean outside, sow Lima Bean outside, sow Okra outside, and sow Anise outside.