Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Marion, IL, based on the USDA Hardiness Zone 6b.
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Marion, IL Frost Dates & Growing Season
Last Spring Frost Date for Marion, IL
The average last frost date in spring for Marion is April 15th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until April 29th 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 Marion, IL
The average first frost date in fall for Marion is October 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 Marion, IL
Based on historical frost data, the estimated growing season length in Marion is approximately 193 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.
Marion, IL Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Marion, IL Monthly Planting Recommendations
February
In February, recommended activities include starting Artichoke seeds indoors (from February 4th to February 18th), starting Oregano seeds indoors (from February 18th to March 4th), and starting Thyme seeds indoors (from February 18th to March 4th).
March
In March, recommended activities include direct sowing Carrot (from March 25th to April 8th), direct sowing Chives (from March 18th to April 1st), and direct sowing Chervil (from March 18th to April 1st).
April
In April, recommended activities include direct sowing Mung Bean (from April 29th to May 13th), direct sowing Milk Thistle (from April 1st to April 15th), and direct sowing Cosmos (from April 22nd to April 29th).