Geranium.

It's been dull and wet today, so I only went out as far as the neighbour's patio garden. She has a wonderful display of geraniums in various shades.
Geranium essential oil is good as a deodorant, a tonic, and a diuretic, the leaves of some varieties can be used to make tea. The rose scented leaves can be used as flavourings for cakes and jellies and the citronella type geranium leaves repel mosquitos when crushed.