Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Oshkosh, WI, based on the USDA Hardiness Zone 5a.
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Oshkosh, WI Frost Dates & Growing Season
Last Spring Frost Date for Oshkosh, WI
The average last frost date in spring for Oshkosh is May 3rd. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until May 17th 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 Oshkosh, WI
The average first frost date in fall for Oshkosh is October 10th. 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 Oshkosh, WI
Based on historical frost data, the estimated growing season length in Oshkosh is approximately 160 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.
Oshkosh, WI Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Oshkosh, WI Monthly Planting Recommendations
February
In February, recommended activities include starting Pansy seeds indoors (from February 22nd to March 8th), starting Snapdragon seeds indoors (from February 22nd to March 8th), and starting Impatiens seeds indoors (from February 22nd to March 8th).
March
In March, recommended activities include starting Black Eyed Susan seeds indoors (from March 8th to March 22nd), starting Brussel Sprout seeds indoors (from March 22nd to April 5th), and direct sowing Spinach (from March 22nd to April 5th).
April
In April, recommended activities include direct sowing Carrot (from April 12th to April 26th), direct sowing Parsley (from April 5th to April 19th), and direct sowing German Chamomile (from April 19th to May 3rd).
May
In May, recommended activities include direct sowing Black Bean (from May 17th to May 31st), direct sowing Mung Bean (from May 17th to May 31st), and direct sowing Zucchini (from May 10th to May 24th).