The ones that grow to 4-5", will they grow larger if you let them? If so it sounds like your flowers are just not being pollinated, if you look in the forum you will find information on how to hand pollinate squash flowers.

I agree, you have a pollination problem. You can try to attract more bees or you will have to hand pollinate. Hand pollination is very easy to do provided you have time in the morning. I am about to go do it right now actually.

Wow - so that's something I've heard about but never done. I'll give it a shot, as I do have some time in the morning. I see instructions on the site here.

Thanks!

So - seems to work! Unfortunately I seem to now be having the same problem as some other folks - where I don't have many females. I think it's a weather and/or lack-of-sunlight issue.

Thanks for the responses.

There is a thred about hand pollinating.
To have more female flowers, pinch off the tip of main branche(when they are 5-10 ft, depending on type) to encourage latteral branch growth. They will have more females, I have heard and I pracice that.

I have been hand polinating my night-flowerin(white color) gourds for two years now. But bumble bees take care of the day opening flowers(orange color) (ornamental gourds, squashes).