The real geranium-

There are annual geraniums, and then there are the real geraniums.
Real geraniums are hardy perennials that come back year after year
on their own and offer a wide range of flower colors, including shades
of white, pink, purple, and blue. If you plant several varieties, you can
see a display of flowers from spring to autumn, and have the benifit of
attractive foliage that provides interest even when the plants aren't in bloom.