When to start? Ontario growers read!

according to a website the last frost is

[FONT=Verdana, Arial, Helvetica, sans-serif]City[/FONT] [FONT=Verdana, Arial, Helvetica, sans-serif]Spring[/FONT] [FONT=Verdana, Arial, Helvetica, sans-serif]Fall[/FONT] [FONT=Verdana, Arial, Helvetica, sans-serif]Barrie*[/FONT] [FONT=Verdana, Arial, Helvetica, sans-serif]5/26[/FONT] [FONT=Verdana, Arial, Helvetica, sans-serif]9/16[/FONT]
5/26, so I should put my 3 week old babies in the dirt then?

Hey, I live in Ontario my self
I start indoors in april, then harden them off in early may then plant outside in late may! works every time