Does anyone else grow giant pumpkins? I have a go at it every year and always end up with good size pumpkins that weigh in at about 350 lbs. Nothing like the 1200 pounders some grow though. The problem is the land that I allot for them is far from the reach of any hose so I have to make walking trips carrying a 50 lb. bucket of water out to them and of course I donât do this enoughâ¦so they donât get enough water. Theyâre not exactly a cash crop for me, really just for fun, so they donât exactly get prime real estate. I plant four plants then only allow one pumpkin to grow on each vine. Iâve consistently ended up with two pumpkins because two vines seem to always die. No matter, two vines cover the lot pretty well. I plant red potatoes under them so by the end of summer the whole area looks like a big weed fest.