Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Herrin, IL, based on the USDA Hardiness Zone 6b.
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Herrin, IL Frost Dates & Growing Season
Last Spring Frost Date for Herrin, IL
The average last frost date in spring for Herrin 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 Herrin, IL
The average first frost date in fall for Herrin 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 Herrin, IL
Based on historical frost data, the estimated growing season length in Herrin 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.
Herrin, IL Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Herrin, IL Monthly Planting Recommendations
February
In February, recommended activities include starting Pansy seeds indoors (from February 4th to February 18th), starting Statice seeds indoors (from February 18th to March 4th), and starting Celery seeds indoors (from February 4th to February 18th).
March
In March, recommended activities include direct sowing Radish (from March 18th to April 1st), direct sowing Chives (from March 18th to April 1st), and starting Marigold seeds indoors (from March 4th to March 18th).
April
In April, recommended activities include direct sowing Beet (from April 1st to April 15th), direct sowing Hyssop (from April 1st to April 15th), and direct sowing Fenugreek (from April 15th to April 29th).