Big Max Pumpkin Seeds . Look for help when it’s time to bring these beauties in from the garden. “Big Max” lives up to his name by producing large pumpkins, reliably in the 20 kg (44 lbs) range. When growing conditions are ideal, this pumpkin will produce fruit that weigh more than 45 kg (100 lbs) measuring in at 175 cm (70″) in diameter.