If you are going to 'plant' mint, make sure it is in pots and put the pots on a tray - you do NOT want mint roots spreading. Mint is almost as invasive as kudzu. We once had a spot in a community garden 10' wide; mint had been planted in the ground 4 plots over (40'). We dug down several feet and chopped out and pulled roots from those plants to keep them out of our space.
If ever "All your base are belong to us" had a ring of truth to it, mint was being referenced.
Of course, if you are actually trying to grow mint, ignore this - it will just die on its own (or is that just me?).
Andrew