I have had it in my herb garden for I think 4 years and keep forgetting to harvest the roots. I find it a bit of a coarse looking plant and haven't yet seen any flowers (I'll keep my eye out this year). It spreads some, but not aggressively. I also seem to have problems with something eating it, you can see the little holes in this photo - not sure what that is, but sometimes a whole leaf is almost skeletonized. Hasn't seemed to affect the vigor though, it's a strong plant. Gets about 2' tall for me.
