I have grown them for two years now. They really crank out zucchini. However, they will do this. I have also grown 3 other varieties that are parthenocopic and they have all done this too. It is ok. Are you keeping them plenty moist? Are these the first two zucchini on these plants? If so, the plants are growing rapidly and sometime don't put the energy into the squash.

Have faith, they will produce a bountiful crop. Check out my link below, it is a picture of the zucchini in my movable high tunnel.

Jay

Here is a link that might be useful: High tunnel Zucchini

Oh thank goodness. There are so many things going wrong in my garden this year I was really starting to get mad!

It is the 1st bunch of zucchini on the plants. I think I am keeping them moist enough - I have soaker hoses that go under the cover, and if it doesn't rain I let them go for 1.5 - 2 hours every 2 or 3 days.

It could also be a calcium deficiency. That is what causes blossom end rot. I have treated for that too, but I occasionally still got it.

Jay

I was going to post the exact same thing! Parthenocarpic my a$$! I had these babies growing under tulle. Mad with glee at the thought that I would finally foil my nemesis, the dreaded SVB. But then baby zuch after baby zuch just rotted on the vine. After about 10, I finally started hand pollinating them and voila, a large zuch developed. The only self pollinating going on here is the pollinating I do myself!

Susan

Oh no susancol, that's bad news. Funny because that was my original title then I deleted it - "self-pollinating my a$$" haha

I really do not have the time to get out there before work in the mornings to hand pollinate so I hope it doesn't come to that!!

If you want the bees to do the work then it's best to grow somethings in your garden that will attract them. It seems across the gardenweb forums there are alot of people that have noticed the lack of bees which is sad. Borage, sunflower, oregano and many other plants will attract bees.

If you're not growing organically then one should be very careful about what, when and where you are spraying. There are many different things that are stressing the bee's environment.

Well my problem isn't that I don't have pollinators. I have lots of flowers growing, all the ones you mentioned plus bergamont, daisies, lots of nasturtiums, marigolds and more.

The problem is if I leave the squash uncovered, they'll get killed by Squash Vine Borers. Evil SVB!

Also I do try to garden organically so I'm not spraying anything.

Here's an update. After weeks and weeks of rotting little squash, I finally gave up and took the row covers off. Sure enough, the squash started to mature, and I ate my 1st delicious normal size squash this Monday. :-) There are two more in my fridge and looks like some more on the vines will be ready soon.

I don't know why they wouldn't get pollinated under the cover. I'm hoping at least the SVB laying season is over and the plants stay alive for a while...