Yeah, that is why I am thinking of planting mint there instead. Should come up with some ways to preserve large amounts of mint when I have it for when its dead over winter though. Mint jelly is an obvious one.

I think mint honey should have a decent shelf life too without requiring refrigeration. Probably isn't that different from mint jelly but using honey as a source of sugar and it isn't set with pectin, which shouldn't really impact the shelf life. Use it like a sweet minty syrup.