I'm growing courgettes for the first time. All seemed to be going well,
they're in a rich soil which I've been feeding weekly, and they've been
growing at a tremendous rate. Started flowering a week and a bit ago, but
the flowers seem awfully fleeting (flower for a day or so, then they close
up) and thus far the first two little baby courgettes have become soft and
atrophied.

What's up with them?

Cheers in advance,

Colin.