Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Dewey, MT, based on the USDA Hardiness Zone 4a.
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Dewey, MT Frost Dates & Growing Season
Last Spring Frost Date for Dewey, MT
The average last frost date in spring for Dewey 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 Dewey, MT
The average first frost date in fall for Dewey is September 5th. 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 Dewey, MT
Based on historical frost data, the estimated growing season length in Dewey is approximately 87 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.
Dewey, MT Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Dewey, MT Monthly Planting Recommendations
April
In April, recommended activities include starting Coleus seeds indoors (from April 15th to April 29th), starting Aubergine seeds indoors (from April 15th to April 29th), and starting Broccoli seeds indoors (from April 15th to April 29th).
May
In May, recommended activities include direct sowing Kale (from May 13th to May 27th), direct sowing Alyssum (from May 27th to June 10th), and direct sowing Lettuce (from May 13th to May 27th).
June
In June, recommended activities include direct sowing Zinnia (from June 17th to July 1st), direct sowing Lemon Balm (from June 10th to June 24th), and direct sowing Nasturtium (from June 17th to June 24th).