Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Greeley, CO, based on the USDA Hardiness Zone 5b.
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Greeley, CO Frost Dates & Growing Season
Last Spring Frost Date for Greeley, CO
The average last frost date in spring for Greeley is May 8th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until May 22nd 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 Greeley, CO
The average first frost date in fall for Greeley is October 4th. 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 Greeley, CO
Based on historical frost data, the estimated growing season length in Greeley is approximately 149 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.
Greeley, CO Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Greeley, CO Monthly Planting Recommendations
February
In February, recommended activities include starting Lavender seeds indoors (from February 27th to March 13th), starting Impatiens seeds indoors (from February 27th to March 13th), and starting Celery seeds indoors (from February 27th to March 13th).
March
In March, recommended activities include starting Cauliflower seeds indoors (from March 13th to March 27th), direct sowing Pea (from March 27th to April 10th), and starting Thyme seeds indoors (from March 13th to March 27th).
April
In April, recommended activities include direct sowing Alyssum (from April 24th to May 8th), direct sowing Swiss Chard (from April 24th to May 8th), and direct sowing Radish (from April 10th to April 24th).
May
In May, recommended activities include direct sowing Butternut Squash (from May 15th to May 29th), direct sowing Anise (from May 15th to May 22nd), and direct sowing Sesame (from May 22nd to June 5th).