"Alan Holmes wrote ...

How to store tubers overwinter?

Any expert out there who knows?(:-)

Whilst I usually leave them in, when I have dug them up I store in
Multipurpose potting compost ('cause it's handy). Don't forget to stand them
upside down for a while so the hollow stems empty of liquid and dry out .
When the shoots start to appear in the spring either plant the tubers out or
if you want to increase your stock, take some cuttings and plant the tubers
later.

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Regards
Bob
In Runnymede, 17 miles West of London