Allotments 4 All

My courgettes are turning brown then black at the tips for about 1/2" at the flower end. They're still very small. Anyone any ideas why this is happening?

I'd guess that they haven't been pollinated properly.

yep, we had a few like that, chopped the bad ones off, now they're producing them faster than we can eat them  ;D

as soon as the courgette starts growing, take of any remains of the flower, which may get wet and start the courgette going rotten