Name: Geranium sanguineum aka bloody cranesbill geranium
Type of Plant: A low growing (1.5 feet tall and wide) perennial for full sun to part shade.
Why I Love/Hate this plant: I love the plant because it gently self-seeds in the garden, is fairly weed smothering, and is covered with pink flowers in June. The species plant has bright pink flowers and there are other varieties that are light pink.
This is an adaptable plant that the deer and rabbits leave alone. It makes a good under-planting for shrubs and a nice front-of-the-border plant for a perennial garden.
A Word to the Wise: There are two ways to handle this plant after it stops flowering. The first is to leave it as is, but know that the seeds that result will sow and grow here and there. The second way to handle it is to chop it down to the ground after the blooms fade, and it will respond with new foliage and even a few new flowers.