Digitalis x mertonensis is the Merton foxglove with rosy-pink flowers and darker speckled throats and lives longer than common foxglove.

Dodecatheon jeffreyi is a western North American native shooting star with loose umbels of pink, deep pink, or magenta flowers.

Dodecatheon meadia 'Album' has loose umbels of pure white flowers with dramatically reflexed petals like a badminton birdie.

Dodecatheon meadia 'Queen Victoria' has loose umbels of pink to lavender-pink flowers with dramatically reflexed petals.

Dodecatheon 'Aphrodite' is a hybrid of a North American native with reflexed pink petals with yellow and red highlights.

Doodia media (syn. Blechnum medium) is a stunning fern with bright red to pink new fronds that darken to green.

Dryopteris affinis 'Cristata' aka 'The King' is a large, bold fern with crested tips.

Dryopteris championii is a large, evergreen fern with arching, dark green, glossy fronds.

Golden mist fern (Dryopteris labordei) has new fronds that emerge gold highlighted with orange and salmon tints.

Dryopteris tokyoensis, commonly called Tokyo wood fern, is an erect, vase-shaped, deciduous fern.

Dryopteris x remota is one of the earliest ferns to emerge in spring and exceptionally drought tolerant.

Dyckia 'Pale Ryder' has dramatic silver-white rosettes of succulent foliage edged with dramatic teeth. A fantastic pot specimen and winter houseplant.

Dyckia 'Red' has dramatic red rosettes of succulent foliage with silver undersides. A fantastic pot specimen and good winter houseplant.

Silver carpet (Dymondia margaretae) is a slowly spreading, evergreen, groundcover from the Western Cape of South Africa

Echeveria setosa is a tender succulent with red flowers and soft, fuzzy silver-white hair on green leaves.

Echinacea pallida 'Hula Dancer' has slender, reflexed, white or pink ray florets around reddish-brown cones.

Echinacea paradoxa has deep yellow, daisy-like flowers and coppery-chocolate-brown central cones.

Echinacea purpurea 'Pink Double Delight' is a shorter purple coneflower with fully-double pink flowers.

Echinacea 'Delicious Candy' has bright magenta-pink coneflowers with horizontally held petals around large, red cones on strong, well-branched stems.

Echinacea purpurea 'Double Decker' / 'Doppleganger' sports a second tier of petals which erupts from the tip of the cone.