Japanes basil tastes like the love child of mint and basil, maybe with a hint of fennel. It also has a large nettle-like leaf that looks stunning floating in a martini glass. It goes well with anything mint and basil go well with, but it will give a drink a more peppery edge.
Grow it: No special instructions needed here; plant Japanese basil just as you would other varieties.
Photo: (cc) Rieh H./Flickr