| Anybody try something like this?
Place 2inch (or more) of dense pink insulating foam down to insulate from cold underneath).
Place a good amount of top soil on top.
Place soil heaters in soil.
Enclose with temporary greenhouse with heat source and even perhaps supplemental light.
Start pumpkins in mid April when the below zero weather and blizzards end.
If I could get a 100+ pound pumpkin to grow where I live it would be really cool, especially when I brought the pumpkin to the 4H fair! | 
