I can’t find the 61-90 data right now but the growing season for CON used to be late May into mid September. Heck look at the difference the last 10 years made at CON…
Last 32°, First 32°, growing season
1981-2010: May 19, Sep 24, 127 days
1991-2020: May 8, Oct 3, 146 days
Of course that’s an average so we still get freezes near June and freezes in mid September like last year. I’m not trying to bust your balls, but 4/15 is early no matter how you slice it. Maybe you get away with it one year, but there’s times where we can pull off a freeze that time of year even with CAA mixing.