OH my! I guess it isn’t the helpful tool I thought it might be at first! I have a friend whose dad was a longtime amazing gardener, and she told me the date he always used as the “Plant Day.” I think I’ll be ok to use that suggestion also as a rule of thumb!
I have a neighbor that planted the end of Feb one year and got lucky with no more frost. But this year we are still having frost nights. We lost some plants last night, and maybe again tonight. It’s always a gamble trying to second guess the weather.