I seeded some "atlantic giant" pumpkins in april, in a big lawn at full sun for all day long.
They started to grow and to flower, and after some time they started to produce some pumpkins. They grew until they became as big as a football. Then the plants started to produce some more fruits. While the first fruits were continuing to grow, the second set become as big as football. Then their skin became wrinkled and they just "collapsed" due to rot.
I've been removing fruits as soon as they start to rot, and the plants remain alive. Their first fruits became bigger and continued to produce some more pumpkins after some time.
What could have been the cause of those fruits rotting? Is it possible to avoid it next time?
Notes: I've been supplying water every morning and every evening to the plants (about 2 liters per plant each time) until the first rotten fruits appeared, then I stopped. I didn't noticed any particular desease on the leaves.