Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Iron river, MI, based on the USDA Hardiness Zone 4a.
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Iron river, MI Frost Dates & Growing Season
Last Spring Frost Date for Iron river, MI
The average last frost date in spring for Iron river is June 5th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 19th 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 Iron river, MI
The average first frost date in fall for Iron river is September 25th. 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 Iron river, MI
Based on historical frost data, the estimated growing season length in Iron river is approximately 112 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.
Iron river, MI Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Iron river, MI Monthly Planting Recommendations
March
In March, recommended activities include starting French Lavender seeds indoors (from March 27th to April 10th), starting Pansy seeds indoors (from March 27th to April 10th), and starting Impatiens seeds indoors (from March 27th to April 10th).
April
In April, recommended activities include starting Basil seeds indoors (from April 24th to May 8th), starting Statice seeds indoors (from April 10th to April 24th), and starting Kale seeds indoors (from April 24th to May 8th).
May
In May, recommended activities include direct sowing Arugula (from May 8th to May 22nd), starting Pumpkin seeds indoors (from May 15th to May 22nd), and direct sowing Fennel (from May 22nd to June 5th).
June
In June, recommended activities include direct sowing Zinnia (from June 12th to June 26th), direct sowing Black Bean (from June 19th to July 3rd), and direct sowing Sesame (from June 19th to July 3rd).