Pi Alpha Xi established a photography contest in 1996 to be held annually in conjunction with the Annual Conference of the American Society for Horticultural Science. The purpose of the contest is to promote Pi Alpha Xi (PAX) to ASHS membership, to support PAX's scholarship program, and to encourage horticulture-related photography. Contestants need not be members of PAX to participate.

This year's competition will take place between May 1, 2013 and July 1, 2013 prior to the ASHS 2013 Annual Conference.

Pi Alpha XI—The Honor Society for Horticulture (PAX) held its annual Open Photography Contest during the ASHS Annual Conference in Miami, Florida, July 31–August 3, 2012.

Pi Alpha XI—The Honor Society for Horticulture (PAX) held its 2011 Open Photography Contest during the ASHS Annual Conference at the Waikoloa Village on Hawaii's Big Island, Sept. 25-28, 2011.

Pi Alpha XI—The Honor Society for Horticulture (PAX) held its 2010 Open Photography Contest during the ASHS Annual Conference, 5-8 August, 2010 in Palm Desert, California.