- J.F. Cordes (Firm)
- J.F. Dreyer (Firm)
- J.F. Jones Nurseries.
- J.F. Martley,
- J.F. Munsell (Firm)
- J.F. Noll & Co.
- J.F. Reece (Firm)
- J.F. Ripps (Firm)
- J.F. Rosenfield (Firm)
- J.F. Rosenfield Peony Gardens.
- J.F. Wilcox (Firm)
- J.G. Burrow (Firm)
- J.G. Carpenter & Co.
- J.G. Harrison & Sons (Berlin, Md.)
- J.G. Prestage & Co.
- J.G. Prestage & Sons.
- J.G. Prestage (Firm)
- J.H. & N.A. Butterfield and Son.
- J.H. Burton And Sons.
- J.H. Callander (Firm)
- J.H. Cooper & Co.,
- J.H. Girardeau, Jr. (Firm)
- J.H. Hale (Firm : South Glastonbury, Conn.)
- J.H. Hale (Firm)
- J.H. Heberling (Firm)
- J.H. Klitgord (Firm),
- J.H. Parker & Co.
- J.H. Patterson (Firm)
- J.H. Punchard (Firm)
- J.H. Ramage (Firm)
- J.H. Schmidt & Son.
- J.H. Shivers Plant Farms.
- J.H. Skinner & Co.
- J.H. Skinner & Company.
- J.H. Skinner and Co.
- J.H. Skinner and Company Nursery.
- J.H. Speers and Co.
- J.H. Troy (Firm)
- J.H. Wilkins & Company.
- J.H.H. Boyd (Firm)
- J.J. Barnes & Co.
- J.J. Barnes' Nurseries.
- J.J. Bell (Firm)
- J.J. Bell Co.
- J.J. Bell Seed Co.
- J.J. Broomall (Firm)
- J.J. Murphy & Co.
- J.J. Styer & Son.
- J.J. Wilson Seed Company.
- J.J.H. Gregory & Son.
- J.K. Alexander (Firm)
- J.K. Henby & Son.
- J.K. Rugowski Seed Co.
- J.K. Rugowski Seed Co. Inc.
- J.L. Callaghan (Firm)
- J.L. Cox And Sons,
- J.L. Downing & Son.
- J.L. Hague (Firm)
- J.L. Hartwell & Son.
- J.L. Loebs (Firm)
- J.L. Loebs Seed Company.
- J.L. Merrick & Co.
- J.L. Normand (Firm)
- J.L. Schiller (Firm)
- J.L. Vondel (Firm)
- J.L.B. Smith Institute of Ichthyology.
- J.M. Bassett (Firm)
- J.M. Bassett Nurseries.
- J.M. Benson (Firm)
- J.M. Fluke (Firm)
- J.M. Howell (Firm)
- J.M. Kimberlin & Co.
- J.M. Lewis & Sons.
- J.M. Lupton & Son, Inc.
- J.M. McCullough's Sons Company.
- J.M. Perkins (Firm)
- J.M. Philips' Sons.
- J.M. Root (Firm)
- J.M. Smith's Sons.
- J.M. Stevens (Firm)
- J.M. Thorburn & Co.
- J.M. Twomey (Firm)
- J.M.T. Wright Nursery Co.
- J.N. Dougan & Son,
- J.N. Dougan & Son.
- J.N. Dougan & Sons.
- J.N. Giridlian (Firm)
- J.N. Rokely & Son.
- J.N. Rokely Nurseries.
- J.O. Kelly & Sons.
- J.P. Abraham,
- J.P. Councill Company.
- J.P. Wood And Sons,
- J.P. Woodward (Firm)
- J.R. & J.B. Miller.
- J.R. and C.T. Larus (Firm)
- J.R. Houston & Sons.
- J.R. McLean (Firm)
- J.R. Palmer & Son,
- J.R. Pirtle & Sons.
- J.R. Ratekin & Son.
- J.R. Reasoner (Firm)
- J.R. Sterling & Sons.
- J.R. Woodham & Son.
- J.R. Woodham & Sons.
- J.R. Woodham and Son.
- J.R. Woodham and Sons.
- J.S. & B. Tweed (Firm)
- J.S. Bosher (Firm)
- J.S. Cook & Son.
- J.S. Farr (Firm)
- J.S. Griffing (Firm)
- J.S. Michael (Firm)
- J.S.K.
- J.T. Doling (Firm)
- J.T. Garrison & Sons.
- J.T. Jones & Son.
- J.T. Lovett Company.
- J.T. Lovett Company.
- J.T. Osborne (Firm)
- J.T. Smith & Son
- J.T. Smith & Sons (Firm)
- J.T. Toben (Firm)
- J.V. Bailey (Firm)
- J.V. Bailey Nurseries.
- J.V. Cotta (Firm)
- J.W. & J.E. Wile.
- J.W. Adams & Co.
- J.W. Adams Nursery Company.
- J.W. Bairstow (Firm)
- J.W. Benson (Firm : Sinton Tex.)
- J.W. Bernstein (Firm)
- J.W. Bittenbender (Firm)
- J.W. Bryan Press
- J.W. Crow (Firm)
- J.W. Crow, Ltd.
- J.W. Davies (Firm)
- J.W. Dillon (Firm)
- J.W. Erwin (Firm)
- J.W. Everetts (Firm)
- J.W. Goddard (Firm)
- J.W. Griesemer (Firm)
- J.W. Hinshaw (Firm)
- J.W. Jones & Son Co.
- J.W. Jones & Son.
- J.W. Jones and Son.
- J.W. Jung Seed Co.
- J.W. Kerr (Firm)
- J.W. Lee and Mrs. J.W. Lee (Firm)
- J.W. Leverich & Son.
- J.W. Levertich & Son.
- J.W. Likins (Firm)
- J.W. Osage Seed Co.
- J.W. Ramsey & Son.
- J.W. Rockey (Firm)
- J.W. Ross (Firm)
- J.W. Ross Co.
- J.W. Ross Company.
- J.W. Sears (Firm)
- J.W. Seiler Co.
- J.W. Smith (Firm)
- J.W. Stevenson (Firm)
- J.W. Stevenson.
- J.W. Stubenrauch (Firm)
- J.W. Tetirick & Son.
- Ja’afar, Nurshazwan
- Jaafar, Zeehan
- Jaagumagi, R.
- Jaanusson, Valdar
- Jaap, Otto
- Jaap, Walter C
- Jaasund, Erik
- Jabaji-Hare, S
- Jabbal, I
- Jabbari, Habibeh
- Jabborov, Anvarbek M.
- Jabbour, Florian
- Jabbour-Zahab, Roula
- Jabeen, Sana
- Jaberhashemi, Seyed Aghil
- Jabłńoska, Agnieszka
- Jablonowski, József
- Jabłońska, Agnieszka
- Jablonska, Maša
- Jablonski, Daniel, 1987-
- Jablonski, David, 1953-
- Jablonski, Eugene, 1892-1975
- Jablonski, Nina G.
- Jablonski, P E
- Jablonski, Paul.
- Jablonski, Piotr G.
- Jablonsky, Carl Gustav, 1765-1787
- Jabon, David,
- Jabouille, Pierre, 1875-1947
- Jac Lefeber & Son'S Lake Hills Bulb Farm & Nursery,
- Jacas, Louis
- Jaccard, Aug. 1833-1895
- Jaccard, Henri, 1844-1922
- Jacchia, Luigi G.
- Jäch, M
- Jach, Manfred
- Jäch, Manfred
- Jäch, Manfred A.
- Jacinavicius, Fernando
- Jacinto, Henrique D.
- Jacinto, José Maria Serejo S.
- Jack, Andrew
- Jack, Bradley N
- Jäck, C. (Carl),
- Jack, Edward
- Jack, I. Allen (Isaac Allen), 1843-1903
- Jack, James B.
- Jack, Jeffrey D.
- Jack, Joel Prashant
- Jack, John G. (John George), 1861-1949
- Jack, Joseph Bernard
- Jack, Joseph Bernhard
- Jack, Robert Logan 1845-1921
- Jack, Rupert W., 1882-1970
- Jack, William
- Jacka, Sally
- Jäckel, Andreas Johannes.
- Jäckel, Hermann
- Jackes, Betsy R.
- Jackes, Betsy R. (Betsy Rivers)
- Jacklet, Jon W., 1935-
- Jackley, Fred.
- Jacklin, Marcie
- Jacklyn, Peter M
- Jackman, Annick
- Jackman, George, 1837-1887
- Jackman, H. E.
- Jackman, J A
- Jackman, Margaret E
- Jackman, Mary.
- Jackman, Ronald E
- Jackman, Todd R
- Jackman, Wilbur S. (Wilbur Samuel), 1855-1907
- Jackobs, J. A. (Joseph Alden)
- Jack's Rainbow Gladiolus Gardens.
- Jacks, Harry, 1908-1994
- Jacks, Lindsay
- Jackson & Perkins Co.
- Jackson and Frost,
- Jackson County (Or.)
- Jackson County Nurseries.
- Jackson Nurseries.
- Jackson S., Douglas.
- Jackson, A
- Jackson, A H