The variety of Mints available is nearly endless and Grapefruit Mint is another quirky one - like all mints it spreads happily (up to three feet with 16" tall stems) and you might therefore choose to keep it in a pot. Also handy on the windowsill, as this mint is delicious as a fresh herb tea with a lovely citrus aroma. 

Mint is a hardy, fast-spreading perennial that thrives in partial shade and moist, rich, well-draining soil. To keep mint plentiful and healthy, it should be watered fairly regularly allowing for about an inch of soil to dry out between each watering. It should be planted in rich soil that drains well and fertilized organically in the spring before it gets too hot. Best grown in zones 5-9.

If you've not grown mint before, you'll learn that it can take over. If you are not interested in it taking over your garden, you may want to consider planting it in a pot that is at least 10" in diameter. This confines the roots and prevents them from spreading all over your bed. 

Mint is generally considered non-toxic to humans and pets. However, as with all plants, it's advisable to monitor pets to prevent excessive consumption. The plant's aromatic properties also make it resistant to deer and rabbit browsing.