Hi, I've been looking for info on overwintering Lime Zinger too.I found some info at www.mobot.org/gardeninghelp/plantfinder
There it said "Dig up rhizomes in fall before first frost for overwintering indoors in a cool, dry place (in the same manner as cannas). Container plants may be brought indoors before frost for overwintering in a cool location either as a houseplant with reduced watering or as a cut back dormant plant." If you find any other info please post and share it. Thanks.

Hilo Beauty is a Xanthosoma also .

Aroideana,

That's funny - I've seen "Hilo Beauty" listed as both Alocasia and Colocasia. Well, rats.

Do you have a citation you can give me?

Check out the following site:
http://www.centralfloridafarms.com/elephantearcare.htm
It may answer your questions.