About Digitalis grandiflora Mill.
Digitalis grandiflora Mill. is a herbaceous perennial that grows from a short rootstock with fibrous roots. This species has glossy green, veined leaves, and its flowering stem can reach a height of 70–120 cm (28–47 in). It produces pale yellow bell-shaped flowers spaced out along the stem; each flower is 3–4 cm (1–2 in) long, with a netted brown marking on its interior. Wild plants of this species bloom in June and July.
As a long-lived perennial cultivated for gardens, Digitalis grandiflora Mill. has earned the Royal Horticultural Society's Award of Garden Merit. It is winter hardy in USDA zones 3 to 8, and grows best in moisture-retentive, well-drained organic soils in partial shade. Cultivated plants bloom from June to August in Germany. In North America, cultivated plants flower from May to June in Missouri, and from June to July in Ohio, with a typical total bloom period of eight weeks.
