Digitalis grandiflora/ambigua, a pale yellow perennial foxglove has always been my favorite perennial foxgloves. It is neither as tall nor as showy as some of the biennial or perennial foxgloves, but it has a quiet, understated charm all its own that I very much admire. Digitalis grandiflora is especially beautiful in my woodland garden where it can get a little shade. The flowers are large, and the yellow is a pleasing, soft buttery yellow - not the jolting yellow associated with summer flowers. It grows to about two feet in well-drained soil and partial shade. Zones 3-8. Quarts.