| Dactylorhiza foliosa |
| Dactylorhiza maculata |
| Dactylorhiza majalis |
| Dactylorhiza majalis praetermissa |
| Dahlia Arabian Night |
| Dahlia Baby Blue |
| Dahlia "Bishop of Llandaff" |
| Dahlia "Bouquet" |
| Dahlia Café au Lait |
| Dahlia Caroline Moon |
| Dahlia David Howard |
| Dahlia Dk 02 |
| Dahlia "Edinburgh" |
| Dahlia Eveline |
| Dahlia Fire Mountain |
| Dahlia Floorinoor |
| Dahlia "Harisbrook" |
| Dahlia Jan van Dinter |
| Dahlia Jescot Julia |
| Dahlia Late |
| Dahlia "Lipoma" |
| Dahlia Maxime |
| Dahlia Nescio |
| Dahlia Petit Purple |
| Dahlia "Roxy" |
| Dahlia Ster van Woensel |
| Dahlia "Sunshine" |
| Dahlia "Sweetheart" |
| Dahlia Sylvia |
| Dahlia Ted's Choice |
| Dahlia "Twilight Time" |
| Dahlia Yelno Harmony |
| Daphne "Anton Fahrdrich" |
| Darmera peltata (Peltiphyllum) |
| Deinanthe caerulea |
| Delosperma brunnthaleri |
| Delosperma cooperii |
| Delphinium |
| Delphinium "Astolat" |
| Delphinium "Bellamosum" |
| Delphinium "Turkish Delight" |
| Delphinium belladonna "Ballkleid" |
| Delphinium elatum hybr. "Sungleam" |
| Delphinium Elatum-hybr. "Blue Jade" |
| Delphinium M.F."Pink and White" |
| Dendranthema weyrichii |
| Deschampsia cespitosa "Goldtau" |
| Deutzia hybrida "Mont Rose" |
| Dianthus "Marjorie Breeze" |
| Dianthus "Mrs. Sinkins" |
| Dianthus "Rose + aubergine" |
| Dianthus amurensis |
| Dianthus deltoides "Artic Fire" |
| Dianthus deltoides "Flashing Light" |
| Dianthus denum |
| Dianthus graniticus |
| Dianthus gratianopolitanus "Feuerhexe" |
| Dianthus J.v.K. |
| Dianthus knappii |
| Dicentra "King of Hearts" |
| Dicentra eximia "Alba" |
| Dicentra eximia "Stuart Boothman" |
| Dicentra formosa |
| Dicentra formosa "Bacchanal" |
| Dicentra formosa "Langtrees" |
| Dicentra spectabilis |
| Dictamnus albus |
| Digitalis "Mertonensis" |
| Digitalis ferruginea "Gigantea"" |
| Digitalis lutea |
| Digitalis parviflora |
| Digitalis sibirica |
| Dodecatheon meadia "Album" |
| Dodecatheon meadia "Queen Victoria" |
| Doronicum orientale |
| Dryas X suendermanii |