try'n to think ahead, I'm know some things can tolerate cooler weather better than others and different plants get set out at different times, what do you set out at certain times of the season ??
I do a google search and once I know the correct temperature I will verify that temp at 8 in the morning with most any type soil thermometer, a grill fork with digital temp gauge works great for me
Anywhere from late April to early may depending on how cool or warm the season is and the plants. Peppers are warmer and some things are cooler, brassicas in general are much earlier and prefer cooler temps
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