Here is a picture of our galangal patch, taken a few months ago now.
It is now bigger, (at least as tall as me at 175cms) and threatening to take over the vegie patch.
We were given a few tubers by one of Action Man's workmates. His wife is Thai, and he had to rip up a patch of galangal in his backyard. Now I know why.
This is major machete stuff, and I have a feeling that this is the sort of plant if you leave the merest skerrick of a tuber, you'll continue to beat it back with sticks for years to come.
And I rarely use the stuff.
Take it from me - don't plant galangal unless you have a major Thai cooking fetish.