Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Cornwall, CT, based on the USDA Hardiness Zone 5b.
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Cornwall, CT Frost Dates & Growing Season
Last Spring Frost Date for Cornwall, CT
The average last frost date in spring for Cornwall is May 23rd. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 6th before moving plants outdoors. Waiting these extra few weeks significantly reduces the risk of a late freeze damaging young transplants.
First Fall Frost Date for Cornwall, CT
The average first frost date in fall for Cornwall is October 5th. This date marks the approximate end of the growing season for tender plants. Gardeners should plan to harvest frost-sensitive vegetables or provide heavy protection (such as row covers) before this date to avoid crop loss.
Growing Season Length in Cornwall, CT
Based on historical frost data, the estimated growing season length in Cornwall is approximately 135 days. This duration determines which vegetable varieties have enough time to reach maturity before the winter cold sets in. Short-season varieties are recommended for crops that require a longer warm period.
Please note: These dates are climatological averages. Actual weather conditions vary by year. Always check the local 10-day forecast before planting.
Cornwall, CT Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Cornwall, CT Monthly Planting Recommendations
March
In March, recommended activities include starting Leek seeds indoors (from March 14th to March 28th), starting Oregano seeds indoors (from March 28th to April 11th), and starting Aubergine seeds indoors (from March 28th to April 11th).
April
In April, recommended activities include direct sowing California Poppy (from April 25th to May 9th), direct sowing Watercress (from April 25th to May 9th), and direct sowing Poppy (from April 25th to May 9th).
May
In May, recommended activities include direct sowing Sunflower (from May 30th to June 13th), direct sowing Quinoa (from May 9th to May 23rd), and direct sowing Cilantro (from May 9th to June 6th).
June
In June, recommended activities include direct sowing Lima Bean (from June 6th to June 20th), direct sowing Butterfly Pea (from June 6th to June 20th), and direct sowing Corn (from June 6th to June 13th).