It sounds like they maybe hungry, have u been fertilizing?

I don't have white giant, I been on the lookout a few years now I guess I'll just order one soon, but what I read is that they ar fast growers, most callas handle compaction amazing well, I grow several and they push thru heavy clay and look great!
I currently am growing several from the captian series and thus far they are impressive growers!

I would try more fertilizer and see what happens, also its possible you could have Extremely bad ph I guess, if you have meter then check it if not they about 10 bucks, I would check one out!
Good luck! If you would like I will happily trade you about 30 dollors worth of my plants for that white giant, then you won't need to worry anymore. : )

Thank you for your response! OK well I transplanted the "White Giant" again and now it's slowly coming back. I am not planning on transplanting it again this year as I know I set it back doing that. I got it in new "peaty" mix and hopefully that will be OK.

I will try fertilizer once it gets going but one thing that worries me is Erwinia rot that Callas sometimes get. I inspected the tuber and there was rotton roots but there were good roots too; the rotten roots were probably just old roots that had been replaced.

I'll let you know when it get's bigger about a possible trade! jeje.

Z

I generally like to give heavy feeding aroids 1/4 strength fert the day after they get transplanted abs watered in... It helps with transplant shock some.
Best of luck