From giant pumpkins that can weigh hundreds of pounds to tiny miniature pumpkins that fit neatly in the palm of a child's hand, there's a pumpkin for just about every need, taste, and desire. Growing pumpkins requires ample space. Give pumpkins, especially the larger ones, plenty of space to sprawl. Different varieties, to some degree, control the size of pumpkins. But for the very largest pumpkins, be sure to provide a constant supply of moisture, sunshine, and fertilizer.