Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Augusta, MT, based on the USDA Hardiness Zone 4a.
On this page:
Augusta, MT Frost Dates & Growing Season
Last Spring Frost Date for Augusta, MT
The average last frost date in spring for Augusta 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 Augusta, MT
The average first frost date in fall for Augusta 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 Augusta, MT
Based on historical frost data, the estimated growing season length in Augusta is approximately 106 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.
Augusta, MT Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Augusta, MT Monthly Planting Recommendations
March
In March, recommended activities include starting Pansy seeds indoors (from March 23rd to April 6th), starting Begonia seeds indoors (from March 23rd to April 6th), and starting Geranium seeds indoors (from March 23rd to April 6th).
April
In April, recommended activities include starting Cauliflower seeds indoors (from April 6th to April 20th), starting Oregano seeds indoors (from April 6th to April 20th), and starting Kale seeds indoors (from April 20th to May 4th).
May
In May, recommended activities include direct sowing Dill (from May 18th to June 1st), direct sowing Radish (from May 4th to May 18th), and direct sowing Chervil (from May 4th to May 18th).
June
In June, recommended activities include direct sowing Zinnia (from June 8th to June 22nd), direct sowing Black Bean (from June 15th to June 29th), and direct sowing Lima Bean (from June 15th to June 29th).