Nyström Per
Odom Jack W.
Odom Richard
Odom Nursery Company
Oide Masao
Oostveen Cornelis A.
Orton Elwin R.
Oudshoorn Anthonius Adrianus Maria
Pan Shifeng
PanAmerican Seed, a division of Ball Horticultural Company
Paradise Seed Co. Pty. Ltd.
Paradise Seed Company
Paradise Seed Company Pty. Ltd.
Parks Clifford Robert
Peerenboom Adrianus Antonius
Pinel Pascal
Pittman Jerry Brunson
Plant Haven, Inc.
Plant Introductions, Inc.
Plant Planet, B.V.