>> 'indirect sow'.
>> plant them out but not in the ground, put them in pots so if you have a late unexpected freeze I can just bring them inside the garage for that one night, or cover them,
My version of that is to come up with some portable shelter that I can put over hardening-off pots that might be "hardening off" for several weeks, waiting for soil to get warm, but too many to fit indoors under lights.