How to grow Erodium (er-o-de-um) From the Greek erodios, a heron; the style and ovaries resemble the head and beak of a heron (Geraniaceae). Heron’s bill. Hardy perennials, closely related to the hardy geraniums, or crane’s bills. There are dwarf species suitable for the rock garden and taller border plants. Species cultivated E. absinthoides, 1 foot or more, violet, pink […]