Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Marvel, CO, based on the USDA Hardiness Zone 5b.
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Marvel, CO Frost Dates & Growing Season
Last Spring Frost Date for Marvel, CO
The average last frost date in spring for Marvel is May 30th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 13th 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 Marvel, CO
The average first frost date in fall for Marvel 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 Marvel, CO
Based on historical frost data, the estimated growing season length in Marvel is approximately 124 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.
Marvel, CO Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Marvel, CO Monthly Planting Recommendations
March
In March, recommended activities include starting Lavender seeds indoors (from March 21st to April 4th), starting French Lavender seeds indoors (from March 21st to April 4th), and starting Impatiens seeds indoors (from March 21st to April 4th).
April
In April, recommended activities include starting Stevia seeds indoors (from April 4th to April 18th), starting Coneflower seeds indoors (from April 4th to April 18th), and starting Tomatillo seeds indoors (from April 4th to April 18th).
May
In May, recommended activities include direct sowing Flax (from May 2nd to May 16th), direct sowing Fennel (from May 16th to May 30th), and direct sowing Garden Cress (from May 2nd to May 16th).
June
In June, recommended activities include direct sowing Runner Bean (from June 6th to June 20th), direct sowing Cosmos (from June 6th to June 13th), and direct sowing Chia (from June 13th to June 27th).