I put squash seeds in with my compost at the end of last year, and apparently it didn't get heated up enough to kill everything. I now have Delicata plants with dinner-plate sized leaves growing out of it.
One of the plants has nice, healthy, 4 and 6 inch squash hanging off of it.
Another of the plants has produced a 10-foot runner with a little squash every foot or so, but every one of those squash has shriveled up after the flower closed up. I had always thought they only did that when they didn't get pollinated, so I went as far as going out there with a small paintbrush and transferring pollen from the male flowers to the female flowers, and the squash still did that.
Could it still be a pollination issue, or would a nutrient imbalance cause the squash to shrivel up?