- Trochine, Carolina
- Trock, Debra K.
- Troeger, Edna Beatrice
- Troeger, John W. (John Winthrop), 1849-
- Troemner, Allan,
- Troendle, Charles A.
- Troendle, Jean
- Troeung, B M
- Troeva, Irina S.
- Trofimets, Alexei V.
- Trofimets, Alexey V.
- Trofimov, Vladimir A.
- Trofimova, T. A. (Tatʹi︠a︡na Aleksandrovna)
- Trofino-Falasco, Clara
- Tröger, Daniel
- Trógolo, Alicia
- Trogstad, Kirsten
- Troguer, Alysson
- Troia, Angelo
- Troiani, Héctor O.
- Troiano, Fernando
- Troiano, G
- Troilius, Adolf Magnus, 1838-1909
- Trois, Cesar Augusto da Cunha
- Troitsky, Aleksey
- Troitsky, Aleksey V.
- Troitzky, A
- Trojahn, Brock
- Trojan, Emanuel, 1878-
- Trojan, Johannes, 1837-1915
- Trojan, Przemyslaw
- Troje, Nikolaus F
- Trolin, Gustaf
- Trollope, Frederick Hamilton,
- Trollope, Jeffrey
- Trombetta, Gian Luigi
- Trombetta, Louis D
- Trombik, Jiří
- Trombin, Daiane Fabris
- Tromble's Nursery.
- Trombotto Liaudat, Dario
- Trombulak, Stephen C
- Trompenaars, H. J. A. J.
- Trompowsky, Patrick Marques
- Tromsø Museum (Norway)
- Tromsø museum.
- Tronchet, Antonin-Benoît-Joseph
- Tronchet, Frédéric
- Troncin, J. P.
- Troncon, E. K.
- Troncos, Jesus S
- Troncoso Castro, J. Max
- Troncoso Rojas, Rosalba
- Troncoso, Alejandro
- Troncoso, Andrea
- Troncoso, Jesús S.
- Troncoso, José
- Troncoso, Nicolas
- Troncoso, Paulina A.
- Troncoso, Víctor A.
- Troncoso-Olivo, Walberto
- Troncoso-Palacios, Jaime
- Troncy, Pierre Maurice
- Trondle, Charles
- Trôndlé, Jean
- Trono, Daniele
- Trono, Gavino
- Tronolone, Valquiria Baddini
- Tronstad, Lusha M.
- Trontelj, Peter
- Troop, James, 1853-1941
- Troop, Judith E
- Troost, Alison I.
- Troost, Gerard, 1776-1850
- Tropea Garzia, Giovanna
- Tropea, Gioele
- Tropea, R.
- Tropek, Robert
- Tropical and Subtropical Agriculture Research Program (U.S.)
- Tropical Flowerland,
- Tropical Gardens (Firm : San Gabriel, Calif.)
- Tropical Groves Nursery,
- Tropical Nursery Co.
- Tropical Paradise
- Tropp, J. M.
- Troschel, F. H. (Franz Hermann), 1810-1882
- Troschel, Hugo,
- Troschel, J Müller F H
- Troschel, Peter, approximately 1620-approximately 1667
- Troshkina, Victoria
- Trost, Alma Edmundovna.
- Trost, Charles H. (Charles Henry), 1934-
- Trost, John Francis, 1897-1972
- Trost, Martin
- Trost, Robert E.
- Tröster, G
- Troth, Henry.
- Troth, R. G.
- Trott, A. C.
- Trott, Alexis
- Trott, J
- Trott, Regina
- Trotta, A
- Trotta, Alessio
- Trotta, Giacomo
- Trotta, Marcelo N. F.
- Trotta-Moreu, Nuria
- Trotter, A. (Alessandro), 1874-1967
- Trotter, Elizabeth S
- Trotter, George Baird, 1948-
- Trotter, Lionel James.
- Trotter, Robert
- Trotter, Robin
- Trotter, Spencer
- Trotter, Warren K. (Warren Kingsbury), 1922-2002
- Trottet, M
- Trotti, Paolo
- Trottier, Garry C. 1946-
- Trottier.
- Troubridge, Jim
- Troudet, Julien
- Trouessart
- Trouessart, E.-L. (Edouard-Louis), 1842-1927
- Troughton, Ellis (Ellis LeGeyt) 1893-1974
- Troughton, Ellis L.G.
- Troughton, S C
- Trouin, Michèle
- Troukens, Willy
- Troup Nursery Company.
- Troup, Robert Scott, 1874-1939
- Troupin, Georges
- Trouse, Albert C.
- Trout Unlimited Canada.
- Trout Unlimited. Big Blackfoot Chapter.
- Trout, Keeper
- Trout, Richard
- Trout, Robert, 1952-
- Troutbeck Nursery.
- Trouvelot, A
- Trouvelot, L.,
- Trouwborst, Arie
- Trovant, Berenice
- Trovão, Dilma Maria de Brito Melo
- Trovao, Joao
- Trovati, Roberto Guilherme
- Trovatti, Eliane
- Trovó, Marcelo
- Trovo, Paola Viviana
- Trow & Smith,
- Trow Press.
- Trow, Albert Howard, 1863-1939
- Trowbridge, Albert H
- Trowbridge, Augustus
- Trowbridge, C. C.
- Trowbridge, Carolyn
- Trowbridge, Cynthia D.
- Trowbridge, David
- Trowbridge, Elinore B.
- Trowbridge, Harry M
- Trowbridge, John
- Trowbridge, Mary L.
- Trowbridge, Nan
- Trower, Julie
- Trowitzsch & Son (Berlin, Germany),
- Trow's Printing and Bookbinding Company
- Troy Chemical Co.
- Troy Nurseries.
- Troy Seed House.
- Troy, Edward P E
- Troy, Hugh Charles, 1867-
- Troy, J. H.
- Troy, Jakelin
- Troy, Jaky
- Troy, Sally
- Troy, Waldo
- Troya, Adrián
- Troyanskaya, Olga
- Troya-Rodríguez, Diana
- Troyer, Byron L.,
- Troyer, Cynthia Lee Ann
- Troyer, Willard A.
- Troyo-Diéguez, Enrique
- Troy's Garden Nurseries.
- Troy's Nurseries, Inc.
- Trristram, Canon
- Truax, firm, manuf.
- Truax, Margaret Ward.
- Truax, T. R. (Thomas Roy), 1886-
- Trübner & Co.
- Trübner, Nicolas
- Truby, Albert E. (Albert Ernest), 1871-1954
- Trucco Alemán, Carlos Eduardo
- Trucco, María Inés
- Truche
- Truchot, Jean-Paul
- Truckenbrod, Allison.
- Trudeau, Richard C.
- Trudell, Yves.
- Trudgen, M
- Trudgen, M. E.
- Trudgen, Malcolm
- True, Alfred Charles, 1853-1929
- True, Daniel G.
- True, Frederick W. (Frederick William), 1858-1914
- True, Gordon H
- True, Katherine
- True, Katherine M.
- True, Rodney H. (Rodney Howard), 1866-1940
- True, T. J.
- True, Webster Prentiss, 1892-
- Trueb, Linda.
- Truelove, Ann
- Trueman, E. R. (Edwin Royden), 1922-
- Trueman, John W. H.
- Trueman, Mandy
- Trueman, Stephen
- Trueman, Trevor
- Truesdale, G. A.
- Truesdale, Harold D
- True-To-Name Nursery.
- Truex, Richard L.
- Trufem, S F B
- Trufem, S F Botelho
- Trufem, Sandra Farto Botelho
- Truffelli, G. Thomas
- Trugilho, Paulo Fernando
- Truhelka, Ćiro, 1865-1942
- Trujano Ortega, Marysol
- Trujillo Vera, Carlos
- Trujillo, Angie Carolina
- Trujillo, Betsabé
- Trujillo, Cristina
- Trujillo, David P.
- Trujillo, Domingo
- Trujillo, Edwin
- Trujillo, Edwin Trujillo
- Trujillo, Emilio J.
- Trujillo, Ernesto
- Trujillo, Héctor
- Trujillo, Henry
- Trujillo, José
- Trujillo, Larry
- Trujillo, Lilian E.
- Trujillo, Lucerina
- Trujillo, Luis A.
- Trujillo, Mateo.
- Trujillo, Pedro Gili
- Trujillo, Verónica Liza
- Trujillo, William
- Trujillo-Arcila, Carlos