Posted: 08/10/2013 at 18:30
Jazzy, your begonias will have corms. As soon as the first frost blackens the stems, remove them from the compost and remove the stems from the corms (round slightly flat bulbs). Let them dry thoroughly and dust off any soil, then wrap them in newspaper and store them in a paper bag or carton box in a dry, cool place. Check them occasionally and remove any soft/rotting ones. Late March or April pot them up again and put them outside after the last frost, usually mid May.