My friend has begonias which have tubers about 6"-8" in diameter and the
stems grow to about 2' in height. He has difficulty in getting two
tubers into a bucket.

He wishes to part the tubers if that is advisable but I could not advise
him because I have no knowledge of such large tubers.

Any suggestions please as to the variety and the appropriate course of
action.

Regards,
Emrys Davies.