"keith wrote
I have lost all but a few of my stuttgarter giant & red baron to stem rot,
mould on top of onions were the stem is.I bent some of the stems over &
others let die back on there own.Then left them on the surface to dry for
week or so.After I tied them by there stems and have been keeping them
hanging in the shed.But they have slowly deteriorated.
What have I done wrong?I was really pleased by the onions I got but have
lost most of them, I would like to grow them next year as apart from this
found them a easy & enjoyable crop to grow.

We do as you do except we always cut the stems off, like in the shops, so
the air can dry them out properly and store them in proper onion sacks. We
have never had any stems rot on ours other than when they have been eaten
into by Leek Moth.
White Rot in another matter!

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Regards
Bob
In Runnymede, 17 miles West of London