Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Keene, NH, based on the USDA Hardiness Zone 5b.
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Keene, NH Frost Dates & Growing Season
Last Spring Frost Date for Keene, NH
The average last frost date in spring for Keene is May 17th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until May 31st 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 Keene, NH
The average first frost date in fall for Keene is October 1st. 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 Keene, NH
Based on historical frost data, the estimated growing season length in Keene is approximately 137 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.
Keene, NH Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Keene, NH Monthly Planting Recommendations
March
In March, recommended activities include starting Pepper seeds indoors (from March 22nd to April 5th), starting Celery seeds indoors (from March 8th to March 22nd), and starting Stevia seeds indoors (from March 22nd to April 5th).
April
In April, recommended activities include direct sowing Poppy (from April 19th to May 3rd), direct sowing Radish (from April 19th to May 3rd), and direct sowing Lettuce (from April 19th to May 3rd).
May
In May, recommended activities include direct sowing Babys Breath (from May 17th to May 31st), direct sowing Lemon Balm (from May 17th to May 31st), and direct sowing Anise (from May 24th to May 31st).