My squash plant, after making 4 fruits, has decided not to make any more. All the female flowers turn yellow and fall off usually before blooming. The male flowers do just fine though. I have the same problem with the acorn squash and the cantaloupe plants which have no fruit. The cucumbers do not have this problem. Is there anything I can do about this?
It could be a lack of pollinators. Have you tried hand pollinating? I don't grow squash, but my melons aren't having any problems. I see lots of bees on their flowers.
According to Squash blossoms drop, and sometimes that’s normal - Indiana Yard and Garden - Purdue Consumer Horticulture: Perhaps temperatures have been unfavorable since the first batch of fruit.
The document Squash Flowers fail to open (.pdf) provides an explanation on how temperature can negatively affect pollination:
