- Head, William R.
- Heading, Alice J.,
- Headland, Frederick William, 1830-1875
- Headlee, Thomas J. (Thomas Jefferson), 1877-1946
- Headley, F. W. (Frederick Webb), 1856-1919
- Headley, Frank Burdette.
- Headley, Joel Tyler, 1813-1897
- Headley, Roy.
- Headley, William L.
- Headrick, D
- Headrick, D H
- Headrick, David H
- Headrick, Heather
- Head's Bergenfield Nurseries.
- Heads, M J
- Heads, Michael
- Heads, Sam
- Heads, Sam W
- Headstrom, Richard, 1902-1985
- Headwaters Forest Research Center (Grand Rapids, Minn.)
- Heady Paul A.
- Heady, Earl Orel, 1916-
- Heady, Harold F.
- Heady, R D
- Heagy, Linny
- Heal, Elizabeth
- Heal, N
- Heal, N F
- Heald, F D
- Heald, F. D. 1872-1954
- Heald, F. D. (Frederick De Forest), 1872-
- Heald, F. E. (Franklin Ernest), 1873-
- Heald, Fred De Forest, 1872-
- Heald, Frederick De Forest, 1872-
- Heald, Frederick De Forest, 1872-
- Heald, Peter Joseph.
- Heald, R. H. (Roy H.)
- Healey, C
- Healey, Christopher
- Healey, Elmer E.
- Healey, M. C. 1942-
- Healey, Marcus J.
- Healey, Michael
- Healey, Patrick L
- Health Institute Laboratories (Paw Paw, Mich.).
- Healy, B
- Healy, Brenda
- Healy, Caroline
- Healy, F. P.
- Healy, George R.
- Healy, George R.,
- Healy, John
- Healy, John M
- Healy, John Martin,
- Healy, Michael A.
- Healy, Michael A., 1839-1904
- Healy, O. M.
- Healy, O. M.,
- Healy, Rosanne
- Healy, Roseanne
- Healy, Steve.
- Healy, William M
- Heaney, D. P.
- Heaney, G F
- Heaney, J Michael
- Heaney, L R
- Heaney, Lawrence R
- Heaney, Lawrence R.
- Heaney, Lee
- Heang, Kiew Bong
- Heap, John
- Heape, Walter, 1855-1929
- Heaphy, Charles
- Heaphy, M. F.
- Heaphy, M. F., Mrs.
- Heaps, J W
- Heapy, Leonard Angus.
- Heard, Douglas C.
- Heard, J. M.
- Heard, John M.
- Heard, Joseph
- Heard, Richard W.
- Heard, Scott
- Heard, Stephen
- Heard, Tim A.
- Heard, William H
- Heard, William R.
- Heardman, C
- Heard's Landscape Nurseries.
- Hearle, Eric, 1893-
- Hearle, Eric.
- Hearn, Alex
- Hearn, Brian J.
- Hearn, Lafcadio, 1850-1904
- Hearn, R W
- Hearn, Ray
- Hearn, Roger W
- Hearn, William
- Hearnden, Mark
- Hearne, Margo E.
- Hearne, S J
- Hearne, Samuel, 1745-1792
- Hearnshaw, John
- Hearsey, Isaac P. (Isaac Patten), 1842
- Hearst Philippine Biodiversity Expedition 2011-
- Hearst, Allen, L.
- Hearst, Peter J.
- Heart of America Nursery & Landscape Co.
- Heart of Egypt Nurseries and Orchards.
- Heart, Auxiliary
- Hearthstone Iris Gardens.
- Hearty, Paul J
- Heaslett, E A
- Heasley's Nurseries.
- Heaslip, W G
- Heasman, M P
- Heatfield, Barry M
- Heath, A
- Heath, Alan
- Heath, Alfred Russell, 1844-
- Heath, Alison
- Heath, Charles, 1785-1848
- Heath, Craig
- Heath, Daniel
- Heath, Douglas Denon, 1811-1897
- Heath, E
- Heath, E A
- Heath, Fannie M.
- Heath, Francis George, 1843-1913
- Heath, George W.
- Heath, H
- Heath, Harold, 1868-
- Heath, Hubert A., 1857-
- Heath, J
- Heath, James Edward
- Heath, James, 1757-1834
- Heath, Joel P.
- Heath, John E
- Heath, Josiah Marshall 1795-1851
- Heath, Maxine Shoemaker, 1935-
- Heath, P M
- Heath, R R
- Heath, Reginald
- Heath, Richard
- Heath, Robert G
- Heath, Roger
- Heath, Wally
- Heathcote F. G.
- Heathcote, Evelyn Dawsonne.
- Heathcote, K A
- Heathcote, P
- Heather Hills Farm,
- Heather Kapplow
- Heather Nursery.
- Heather Society
- Heather, N W
- Heatherbell, George.
- Heatherfells Nursery,
- Heatherhome Seed and Nursery Co.
- Heatherley, Francis.
- Heatherly, Larry G., 1946-
- Heathfield, Richard.
- Heath'S Nursery,
- Heatley, Margaret
- Heatly, Suetonius Grant Tollemache
- Heaton, Edmund
- Heaton, Herbert
- Heaton, Jill S.
- Heaton, R R
- Heaton, Samuel.
- Heatubun, Charlie Danny
- Heatwole, H
- Heatwole, H F
- Heatwole, Harold
- Heatwole, Harold F
- Hébant-Mauri, R
- Hébant-Mauri, Rose
- Hebard, Morgan, 1887-1946
- Hebard, William B
- Hebauer, Franz
- Hebb, Robert S.
- Hebbelinck, Marc
- Hebbeln, D
- Hebbeln, Dierk
- Hebben, Thorsten.
- Hebblewhite, W R
- Hebda, Andrew
- Hebda, R J
- Hebda, Richard J
- Hebden H. Corsan (Firm : Hillsdale, Mich.)
- Hebden, Joan
- Hebden, Joseph
- Hebel, Ingrid
- Hebenstreit, J.E.
- Hebenstreit, Johann Ernst, 1703-1757
- Hebenstreit, Johann Paul, 1664-1718
- Heberdey, Philipp
- Heberdey, Rudolf F
- Heberle Brothers Nurseries.
- Heberle Nursery Company,
- Heberle, Ronald L
- Heberlein, Claudia
- Heberling, H. G.
- Heberling, J. H.
- Heberling, J. S.,
- Hebert, Craig
- Hébert, G. Ann.
- Hebert, Henry J-C
- Hébert, Jacques-René, 1757-1794
- Hebert, P
- Hebert, Paul
- Hebert, Paul D N
- Hébert, Percy N.
- Hébert, Rémi
- Hebets, E A
- Hebets, Eileen A
- Hebling, Nilton José
- Hebrank, John H
- Hebrank, Mary Reidy
- Hebrard, J. J.
- Hebron Heights Gardens Gladioli.
- Hebron Heights Gardens Gladiolus.
- Hebron, Wendy
- Hechavarria, María Elena Potrony
- Hechem, Viviana
- Hechenleitner, Paulina
- Hechinger, Ryan
- Hechler, Ken, 1914-
- Hecht, Bessie M.
- Hecht, É.
- Hecht, G
- Hecht, Max K., 1925-
- Hecht, T. (Thomas)
- Hecht, Vera
- Hecht, William Robert
- Hechtel, Fred O P
- Hechtel, G J
- Hechtel, George
- Heck, Albert S.
- Heck, Arthur Floyd.
- Heck, Carl Robert.
- Heck, Frank
- Heck, Frank.
- Heck, H
- Heck, J. G. (Johann Georg), 1857
- Heck, J. G. (Johann Georg), 1857
- Heck, Jerome Ronald.
- Heck, Kenneth L., Jr.
- Heck, Ludwig, 1860-1951
- Heck, W R