- Hardham, Clare B
- Hardi, Justin Steven
- Hardie, Alistair K.
- Hardie, Craig
- Hardie, Jim
- Hardie, John
- Hardie, Martin, 1875-1952
- Hardigree, G.A.
- Hardikar, B P
- Hardin Groves & Nurseries.
- Hardin Groves and Nurseries.
- Hardin, Garrett
- Hardin, J A
- Hardin, J W
- Hardin, James L.
- Hardin, James W
- Hardin, James W.
- Hardin, James W. (James Walker), 1929-
- Hardin, Mary Ellen
- Hardin, R. H.,
- Hardin, Tim.
- Harding, A. R. (Arthur Robert), 1871-1930
- Harding, Alice Howard.
- Harding, Alice.
- Harding, C
- Harding, Caleb F.
- Harding, Charles
- Harding, Douglas
- Harding, E. W.
- Harding, H G A
- Harding, H Ronnie
- Harding, H. C.
- Harding, I C
- Harding, Ian C
- Harding, J P
- Harding, J.
- Harding, James
- Harding, John Philip
- Harding, John.
- Harding, Juliana M
- Harding, K A
- Harding, Lee
- Harding, Luke
- Harding, Murray
- Harding, Paul
- Harding, Paul L. (Paul Lewis), 1898-
- Harding, Paul T
- Harding, Richard Joseph Anthony, 1892-
- Harding, Robert W.
- Harding, Samuel T.
- Harding, Samuel, active 1722-1755
- Harding, W A
- Harding, W J
- Hardisty, E S
- Hardjasasmita, Sjarief
- Hardman, Amanda
- Hardman, J R Peter
- Hardman, Lotta
- Hardman, Michael
- Hardstaff, Lyndle K
- Hardt, Elisa
- Hardt, Richard A.
- Hardtle, Werner
- Härdtle, Werner
- Hardwick, D F
- Hardwick, David F
- Hardwick, J.W.
- Hardwick, L W
- Hardwick, Rose N.
- Hardwick, Scott
- Hardwicke, Herbert Junius.
- Hardwicke, Robert
- Hardwicke, Thomas, 1756-1835
- Hardwicke, William Wright.
- Hardwood Manufacturers' Institute.
- Hardy BBT Limited.
- Hardy Evergreen Gardens.
- Hardy Fern Foundation.
- Hardy Garden Co.
- Hardy Nursery & Seed Company.
- Hardy Plant Nursery.
- Hardy, A D
- Hardy, A R
- Hardy, A T
- Hardy, A. S., Mrs., 1846-1928
- Hardy, Alan
- Hardy, Alan R
- Hardy, Angela
- Hardy, C. R.
- Hardy, Campbell, 1831-1919
- Hardy, Charles A.
- Hardy, Charles E.
- Hardy, D E
- Hardy, D Elmo
- Hardy, De'Jah
- Hardy, Donna Fitzroy
- Hardy, Dr.
- Hardy, Elsa R.
- Hardy, Elsa Rodrigues
- Hardy, Elsa. R.
- Hardy, F G
- Hardy, Florence Emily, 1881-1937
- Hardy, G A
- Hardy, G E St J
- Hardy, G S
- Hardy, George A
- Hardy, George H.
- Hardy, George Hudleston Hurlstone
- Hardy, Giles
- Hardy, Giles Edward St John
- Hardy, Graham S
- Hardy, J
- Hardy, J W
- Hardy, J. H. (John H.)
- Hardy, J. I.
- Hardy, James
- Hardy, James L.
- Hardy, Jerry D.
- Hardy, Jerry David
- Hardy, John James.
- Hardy, John W
- Hardy, John William
- Hardy, John William.
- Hardy, John.
- Hardy, Jonathan
- Hardy, Laura M
- Hardy, Laurence M
- Hardy, Laurence M.
- Hardy, Maarcel E 1876-
- Hardy, Manly
- Hardy, Marcel E., 1876-
- Hardy, Margaret H.
- Hardy, Nate
- Hardy, Nate B
- Hardy, Olivier
- Hardy, P B
- Hardy, P G
- Hardy, Peter B
- Hardy, R
- Hardy, Randall W.
- Hardy, Ronald W
- Hardy, Ruth,
- Hardy, Stephanie Randa L., 1960-
- Hardy, Thomas A.
- Hardy, Thomas, 1840-1928
- Hardy-Field Nursery & Seed Co.
- Hardy-Field Nursery & Seed Company.
- Hardy'S Nursery,
- Hare, Arthur W.
- Hare, Butler B.
- Hare, Charles B.
- Hare, E J
- Hare, G T
- Hare, H. A. (Hobart Amory), 1862-1931
- Hare, Harold Richard, 1889-
- Hare, J D
- Hare, J Daniel
- Hare, J E
- Hare, James F
- Hare, L
- Hare, P. Gregory
- Hare, R. F. (Raleigh Frederick), 1870-
- Hare, Robert C.
- Hare, Valerie
- Harebottle, Doug M
- Haren, Merel M. van
- Haresign, T
- Harestad, Alton S.
- Haretche, Federico
- Harford, W G W
- Harford, W. G. W. (William George Washington), 1825-1911
- Harford, William G. W., 1825-1911
- Harger, E B
- Harger, Edgar Burton, 1867-
- Harger, J R
- Harger, J. Robin E., 1938-
- Harger, Oscar, 1843-1887
- Harger, R. L.
- Harger, Simon J. J.
- Hargett, Frank C.
- Hargett, M. T.
- Hargis & Sommer.
- Hargis, William J.
- Hargitt, Charles W. (Charles Wesley), 1852-1927
- Hargitt, George Thomas, 1881-
- Hargrave, Basil.
- Hargrave, L. L.
- Hargrave, Lawrence
- Hargrave, P. D.
- Hargrave, Percival Duncan.
- Hargraves, Paul E.
- Hargreaves, E
- Hargreaves, Peter
- Hargreaves, Roy
- Hargreaves, Serene
- Hargrove, W W
- Harguinteguy, Carlos A.
- Hargus, Sharon
- Hari, Tanmoy
- Haribal, M
- Haribal, Meena
- Haridas, Biju
- Haridas, P
- Haridasan, K
- Haridasan, Mundayantan
- Haridasan, Mundayatan
- Haridasan, Padmaja
- Haridy, M A S
- Haridy, M S A
- Harigaya, Toshio
- Harihar, A
- Harikrishnan, S
- Haring, C. M. (Clarence Melvin), 1878-1951
- Haring, Elisabeth
- Haring, Fritz
- Haring, Inez M
- Harington, Alexis
- Harington, Alexis.
- Harington, C. R. (Charles Richard), 1933-
- Harington, H. H. (Herbert Hastings), 1868-1916
- Harington, Major H H
- Hariot, Paul, 1854-1917
- Hariot, Thomas, 1560-1621
- Haris, Hidayah
- Harison, Michael
- Harisson, J G
- Harit, D K
- Harit, D N
- Harit, Daya Nand
- Hariyama, Takahiko
- Harizanova, Vili
- Harkantra, Sadanand
- Harke, Donald T
- Harken, Walter
- Harker, Alfred, 1859-1939
- Harker, Charles C.
- Harker, G
- Harker, George Percy
- Harker, Mollie
- Harker, Mollie
- Harketts Floral Nursery.
- Harkey Bros. Nurseries.
- Harkey, M. L.
- Harkin, James Bernard, 1875-
- Harkins, Charles E
- Harkins, Gordon S.
- Harkleroad, M. F.
- Harkness, A. D.
- Harkness, B
- Harkness, Bernard