Too much or too little water? Feed? I'm sure you have thought of these things.

I find this sometimes happens to the first few. Pick them off and then hopefully you'll get some good ones.

We think its too much water with all this rain, we now need some dry sunny weather.

This will also happen if they are not pollinated. Get some pollen off of a male flower--no baby courgette in the back--and daub it onto the center column of a female flower or two, early in the morning. That should allow them to develop fully.

Thanks all, I thought it may be due to the watering, but I will try the pollination trick too, as I have a feeling that I did this last time I grew them.

Thanks again