Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Dillon, CO, based on the USDA Hardiness Zone 4b.
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Dillon, CO Frost Dates & Growing Season
Last Spring Frost Date for Dillon, CO
The average last frost date in spring for Dillon is June 10th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 24th 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 Dillon, CO
The average first frost date in fall for Dillon is September 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 Dillon, CO
Based on historical frost data, the estimated growing season length in Dillon is approximately 83 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.
Dillon, CO Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Dillon, CO Monthly Planting Recommendations
April
In April, recommended activities include starting Sage seeds indoors (from April 29th to May 13th), starting Ground Cherry seeds indoors (from April 15th to April 29th), and starting Kale seeds indoors (from April 29th to May 13th).
May
In May, recommended activities include direct sowing Mustard (from May 13th to May 27th), direct sowing Cilantro (from May 27th to June 24th), and direct sowing Swiss Chard (from May 27th to June 10th).
June
In June, recommended activities include direct sowing Lemon Balm (from June 10th to June 24th), direct sowing Okra (from June 24th to July 8th), and direct sowing Babys Breath (from June 10th to June 24th).