Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Lewis, CO, based on the USDA Hardiness Zone 6a.
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Lewis, CO Frost Dates & Growing Season
Last Spring Frost Date for Lewis, CO
The average last frost date in spring for Lewis is June 1st. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 15th 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 Lewis, CO
The average first frost date in fall for Lewis is October 7th. 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 Lewis, CO
Based on historical frost data, the estimated growing season length in Lewis is approximately 128 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.
Lewis, CO Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Lewis, CO Monthly Planting Recommendations
March
In March, recommended activities include starting Petunia seeds indoors (from March 23rd to April 6th), starting Snapdragon seeds indoors (from March 23rd to April 6th), and starting Begonia seeds indoors (from March 23rd to April 6th).
April
In April, recommended activities include starting Sage seeds indoors (from April 20th to May 4th), starting Tomatillo seeds indoors (from April 6th to April 20th), and starting Aubergine seeds indoors (from April 6th to April 20th).
May
In May, recommended activities include direct sowing Radish (from May 4th to May 18th), direct sowing Fennel (from May 18th to June 1st), and direct sowing Carrot (from May 11th to May 25th).
June
In June, recommended activities include direct sowing Morning Glory (from June 8th to June 22nd), direct sowing Lima Bean (from June 15th to June 29th), and direct sowing Pumpkin (from June 8th to June 22nd).