Mint

 

Mint is quite easy to grow in a container.  In fact, it might even be preferable.  Mint will take over everything, so by putting it in a container you can limit it a bit and keep it under control.  The roots are quite invasive, and the plant will also send out 'feelers' to find new places to put down roots.  Choose a container based on what type of mint you have.  In the above photo, spearmint is growing tall and straight and thrives in this teacup-shaped ceramic container.  Below, chocolate mint has more tender stems than the spearmint.  Since it tends to drape over the sides of the pot, I put it in a hanging basket.  Especially in the summer, there's nothing more refreshing than being able to pluck a few leaves and brew a delicious cup of mint tea!