Foxglove - An old-fashioned favorite, foxglove features tall spikes of bell-shaped flowers. Not only is it elegant, but foxglove is extremely hardy and easy to grow. Foxglove is also known for its resistance to pests and diseases. So if you want to increase your garden’s pest resistance, try planting foxglove along the borders.
Digitalis grandiflora is the yellow foxglove. As you probably know, Digitalis is poisonous. Here's some info on growing foxglove, with a picture of the more common purple type: http://landscaping.about.com/od/plantsforshadyareas/p/foxglove_plants.htm