Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Cathedral, CO, based on the USDA Hardiness Zone 5b.
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Cathedral, CO Frost Dates & Growing Season
Last Spring Frost Date for Cathedral, CO
The average last frost date in spring for Cathedral is June 2nd. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 16th 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 Cathedral, CO
The average first frost date in fall for Cathedral is September 15th. 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 Cathedral, CO
Based on historical frost data, the estimated growing season length in Cathedral is approximately 105 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.
Cathedral, CO Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Cathedral, CO Monthly Planting Recommendations
March
In March, recommended activities include starting Onion seeds indoors (from March 24th to April 7th), starting Geranium seeds indoors (from March 24th to April 7th), and starting Pansy seeds indoors (from March 24th to April 7th).
April
In April, recommended activities include starting Kale seeds indoors (from April 21st to May 5th), starting Broccoli seeds indoors (from April 7th to April 21st), and starting Tomatillo seeds indoors (from April 7th to April 21st).
May
In May, recommended activities include direct sowing California Poppy (from May 5th to May 19th), starting Cantaloupe seeds indoors (from May 5th to May 19th), and starting Pumpkin seeds indoors (from May 12th to May 19th).
June
In June, recommended activities include direct sowing Okra (from June 16th to June 30th), direct sowing Runner Bean (from June 9th to June 23rd), and direct sowing Cosmos (from June 9th to June 16th).