Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Lima, MT, based on the USDA Hardiness Zone 4a.
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Lima, MT Frost Dates & Growing Season
Last Spring Frost Date for Lima, MT
The average last frost date in spring for Lima is June 12th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 26th 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 Lima, MT
The average first frost date in fall for Lima 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 Lima, MT
Based on historical frost data, the estimated growing season length in Lima is approximately 81 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.
Lima, MT Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Lima, MT Monthly Planting Recommendations
April
In April, recommended activities include starting Petunia seeds indoors (from April 3rd to April 17th), starting Snapdragon seeds indoors (from April 3rd to April 17th), and starting Impatiens seeds indoors (from April 3rd to April 17th).
May
In May, recommended activities include direct sowing California Poppy (from May 15th to May 29th), direct sowing Spinach (from May 1st to May 15th), and direct sowing Radish (from May 15th to May 29th).
June
In June, recommended activities include direct sowing Nasturtium (from June 19th to June 26th), direct sowing Zinnia (from June 19th to July 3rd), and direct sowing Okra (from June 26th to July 10th).