If the flowers haven't opened up then the reason is probably related to the growing conditions. A squash flower won't get pollinated unless it opens (usually). Also, a female flower won't get pollinated without a male flower and if it doesn't get pollinated the plant aborts the fruit and the fruit shrivels (unless it's parthenocarpic, which means it doesn't need to get pollinated to set fruit).

If the plant is healthy the only thing I can suggest is to just wait for better weather and see if the problem corrects itself.

Rodney

Agree that if there have been no male flowers (some find only males and no females) then the plant is stressed and simply isn't ready to reproduce.

So there is no pollination problem since there is nothing there to pollinate them with. Usually they only open very early in the AM anyway - like just after dawn - so you may not see it.

As to why the plant is stressed, there can be many reasons. The rain is the most likely from the info you provide but nutrient levels and air temps and age of the plant also play a role.

I suggest you review the FAQs here on growing squash for more details.

Dave

Here is how I solved the problem.

This may or may not work for others. Do you have a soil test?

In my case I was excessive in Magnesium and the Phosphorous/Magnesium ratio was way out of limits.

I could also tell from observation that even though I put on 13-13-13 fert. the same thing happened. Since it looked like the Phosphorus level was off I added JUST MAP and in two days flowers developed ok! My problem solved. Hope this helps.

Greg

What's JUST MAP?

Sorry, Monoammonium phosphate. I guess you could use 0-58-0 or a similar phosphorous only fert.

Ahhh... ok, I'm almost ready for a soil test, but throughout winter, I routinely apply liquid urea on top of the leaves and organic matter mulch. That gets turned in come spring, so not usually a problem here getting phosphorous into the growing beds.