Tried planting a root taro this year. Variety with a purple dot where the stalk is attached to leaf.

Well watered but under a tree, so part shade in summer. It grew like topsy, plenty of leaves to 5 foot high and then had lots of little babies round it. Decided to dig it up hoping for a giant sized taro but guess what? All leaves no big taro.......Just lots of little cormels.

Is it too cold for taro here? More sunshine? Anyone grow taro this far south?