The Atlantic Giant pumpkin variety is the best variety for growing a giant pumpkin. I have grown them a few times over the past five years and I have had great results overall. In 2002 I grew a 220 pound pumpkin. This variety requires fertile, loose, and well drained soil in a sunny location. The plants are very fast growing and you can easily grow a 100-300 pound pumpkin! With a little extra work you can grow a 500+ pound pumpkin! For best results fertilize once a week and shade pumpkins when they reach about baseball size. I highly recomend this variety for anyone who wants to grow a GIANT pumpkin in their garden.