- D. M. Ferry & Co. (109)
- Dakota Improved Seed Co. (5)
- Darrow, Erastus (E. Darrow & Brother) (1)
- Davenport Nurseries (1)
- Davenport Nursery Co. (1)
- Davenport-Hagen, Lynne (1)
- DeGiorgi Seed Company (2)
- Delhi Nursery, E.B. Porter Proprietor (1)
- Denison Seed Co. (1)
- Depot Road Nurseries (1)
- Des Moines Nursery Co. (3)
- Des Moines Seed Co. (1)
- Desfontaines, René Louiche (1)
- Detroit Seed Co. (2)
- Dewey, D.M. (8)
- Dick, Ronda (3)
- Dixon, F. W. (4)
- Dodel, Arnold (1)
- Dodel-Port, Arnold (16)
- Dodel-Port, Carolina (1)
