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White form of the purple foxglove, biennial of the Plantaginaceae family, it appears spontaneously in wild populations of Digitalis purpurea throughout the species' native range — Western and Central Europe — and has been selected and stabilized in cultivation for the purity of its hue.
The habit is identical to that of the type form: large rosette of oval, softly downy leaves, medium green, from which in the second year a robust, upright stem rises 100 to 150 cm bearing a long, densely packed one-sided spike.
The tubular flowers, in an elongated thimble shape, are pure white to creamy white, with the throat finely speckled with purple-brown dots on a white background, edged with a clear border. This speckled throat, the only color reminder on an entirely immaculate spike, creates a discreet and elegant contrast. The entire spike, seen from afar, produces a particularly striking luminous effect in shaded situations.
In its natural habitat, flowering extends from June to August. In cultivation, it generally occurs from May to July.
Same requirements as the type species: fresh, acidic to neutral, well-drained soil, partial shade or edge. It self-seeds freely but the offspring may revert to pinkish hues; to maintain the alba form, sorting of the plants is necessary.