Our garden is in Northern California, on the coast. Last year the pumpkin patch did not get seeds until late June and they were not ready by Halloween. So this year the patch was seeded by late March and the sprouts were immediately devoured by slugs and earwigs. A heavy application of organic insecticide killed off all the little pests and by early May I thinned the sprouts to just one robust plant. It is now host to more than 20 linear feet of vine.
But the swellings under the female blossoms just turn black, rot, and fall off.
Does anyone have any ideas about what to do next year (or even now) to fix this problem. I and my neighbors are at a loss, but to be fair, they are not growing pumpkins.