
Well, I'm not in WI, but our planting dates may be close ...
My average last frost is May 15, however I have learned that gambling with Old Man Frost is futile.
I rarely plant any tender plants out before the last weekend in May.
I also have jumped the gun, starting some things inside too early over the years.
This guide works well for me ... counting the weeks back from May 29.
Starting Seed Indoors
I started onion seed inside Feb.14
peppers, inside March 18
tomatoes, I started a few March 18 that I plan to plant in large pots and can keep in the porch until safe from frost. Most will be started April 4 ( worked very well for me the last few years) They will get re-potted at about 3-4 weeks to 4" pots or beer cups.
Cool tolerant plants... it really depends on Spring weather, soil temps, and when I can get in the garden... Usually the first part of May.
I'm probably a bit overly cautious, but I've learned to appreciate low stress gardening ...
