Keep it - it's gorgeous!
Candied angelica can be bought in silly little containers in supermarkets (at enormous price). My mum used to use it for decorating trifles, but I have a white Christmas cake recipe that uses rather a lot, and it tastes fantastic.I've had to search to find a better source than the supermarkets. Here's a recipe for candying Angelica: http://www.food.com/recipe/homemade-candied-angelica-for-cakes-bakes-and-desserts-248003
I've grown angelica to candy, and it grew big and beautiful, but when I picked it the hollow stems were full of insects and threw the lot away - it was disgusting I've grown it in my new house but it didn't grow very well so I'm still buying the candied stuff.
Another use is when stewing rhubarb, put an angelica leaf in there too. It tastes good, and it means you don't have to use so much sugar to sweeten it.
I've just joined the site and I'm not sure of the etiquette. I could post the white Christmas cake recipe if you were interested, or post it to you.