Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Colorado city, CO, based on the USDA Hardiness Zone 5b.
On this page:
Colorado city, CO Frost Dates & Growing Season
Last Spring Frost Date for Colorado city, CO
The average last frost date in spring for Colorado city is May 21st. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 4th 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 Colorado city, CO
The average first frost date in fall for Colorado city 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 Colorado city, CO
Based on historical frost data, the estimated growing season length in Colorado city is approximately 133 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.
Colorado city, CO Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Colorado city, CO Monthly Planting Recommendations
March
In March, recommended activities include starting Statice seeds indoors (from March 26th to April 9th), starting Black Eyed Susan seeds indoors (from March 26th to April 9th), and starting Impatiens seeds indoors (from March 12th to March 26th).
April
In April, recommended activities include direct sowing Watercress (from April 23rd to May 7th), direct sowing Arugula (from April 23rd to May 7th), and direct sowing Potato (from April 23rd to May 7th).
May
In May, recommended activities include direct sowing Milk Thistle (from May 7th to May 21st), direct sowing Nasturtium (from May 28th to June 4th), and direct sowing Butternut Squash (from May 28th to June 11th).
June
In June, recommended activities include direct sowing Corn (from June 4th to June 11th), direct sowing Melon (from June 4th to June 18th), and direct sowing Sesame (from June 4th to June 18th).