Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Irondale, MO, based on the USDA Hardiness Zone 6b.
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Irondale, MO Frost Dates & Growing Season
Last Spring Frost Date for Irondale, MO
The average last frost date in spring for Irondale is April 21st. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until May 5th 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 Irondale, MO
The average first frost date in fall for Irondale is October 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 Irondale, MO
Based on historical frost data, the estimated growing season length in Irondale is approximately 177 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.
Irondale, MO Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Irondale, MO Monthly Planting Recommendations
February
In February, recommended activities include starting Leek seeds indoors (from February 10th to February 24th), starting Ground Cherry seeds indoors (from February 24th to March 10th), and starting Cauliflower seeds indoors (from February 24th to March 10th).
March
In March, recommended activities include direct sowing Chervil (from March 24th to April 7th), direct sowing Sweet Pea (from March 24th to April 7th), and direct sowing Parsley (from March 24th to April 7th).
April
In April, recommended activities include direct sowing Cilantro (from April 7th to May 5th), direct sowing Hyssop (from April 7th to April 21st), and direct sowing Babys Breath (from April 21st to May 5th).
May
In May, recommended activities include direct sowing Lima Bean (from May 5th to May 19th), direct sowing Butterfly Pea (from May 5th to May 19th), and direct sowing Black Bean (from May 5th to May 19th).