Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Gillette, WY, based on the USDA Hardiness Zone 5a.
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Gillette, WY Frost Dates & Growing Season
Last Spring Frost Date for Gillette, WY
The average last frost date in spring for Gillette is May 22nd. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 5th 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 Gillette, WY
The average first frost date in fall for Gillette is September 20th. 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 Gillette, WY
Based on historical frost data, the estimated growing season length in Gillette is approximately 121 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.
Gillette, WY Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Gillette, WY Monthly Planting Recommendations
March
In March, recommended activities include starting Celery seeds indoors (from March 13th to March 27th), starting Cabbage seeds indoors (from March 27th to April 10th), and starting Tomatillo seeds indoors (from March 27th to April 10th).
April
In April, recommended activities include direct sowing Bok Choy (from April 24th to May 8th), direct sowing Alfalfa (from April 24th to May 8th), and direct sowing California Poppy (from April 24th to May 8th).
May
In May, recommended activities include direct sowing Fennel (from May 8th to May 22nd), direct sowing Nasturtium (from May 29th to June 5th), and direct sowing Beet (from May 8th to May 22nd).
June
In June, recommended activities include direct sowing Watermelon (from June 5th to June 19th), direct sowing Black Bean (from June 5th to June 19th), and direct sowing Corn (from June 5th to June 12th).