Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Brillion, WI, based on the USDA Hardiness Zone 5a.
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Brillion, WI Frost Dates & Growing Season
Last Spring Frost Date for Brillion, WI
The average last frost date in spring for Brillion is May 8th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until May 22nd 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 Brillion, WI
The average first frost date in fall for Brillion 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 Brillion, WI
Based on historical frost data, the estimated growing season length in Brillion is approximately 155 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.
Brillion, WI Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Brillion, WI Monthly Planting Recommendations
February
In February, recommended activities include starting Leek seeds indoors (from February 27th to March 13th), starting Impatiens seeds indoors (from February 27th to March 13th), and starting Petunia seeds indoors (from February 27th to March 13th).
March
In March, recommended activities include starting Black Eyed Susan seeds indoors (from March 13th to March 27th), starting Cauliflower seeds indoors (from March 13th to March 27th), and starting Oregano seeds indoors (from March 13th to March 27th).
April
In April, recommended activities include direct sowing Cilantro (from April 24th to May 22nd), starting Cantaloupe seeds indoors (from April 10th to April 24th), and direct sowing Chives (from April 10th to April 24th).
May
In May, recommended activities include direct sowing Moss Rose (from May 15th to May 29th), direct sowing Cosmos (from May 15th to May 22nd), and direct sowing Butternut Squash (from May 15th to May 29th).