Posted: 16/12/2014 at 17:20
Yes, it's very tempting to try and grow it on, but frankly it isn't worth the effort. It is a tropical plant and needs it hot and damp. If you want to then use it you have to dig it up and you will find it is little bigger than when you planted it.
Best to buy it for recipes; it's cheap enough. Store it in the freezer and use it from frozen. Where a recipe says slice, grate it instead; you don't need to thaw it.
If you want to grow ornamental ginger look for hedechyium (I've grown it but not sure of the spelling!). It has a pretty flower but not the perfume I was expecting.