农业，农业综合企业和环境科学系提供合作博士学位。通过与位于大学城的德克萨斯A＆M大学的园艺科学系合作，开展园艺专业课程。该学位是由德克萨斯农工大学授予的，但是，大部分课程工作，研究和研究生咨询都可以在德克萨斯农工大学-金斯维尔和/或德克萨斯农工大学-金斯维尔柑橘中心完成。导致该学位的研究生学习可以包括园艺的任何方面。强烈建议该计划的学生在大学城的得克萨斯州A＆M大学住至少两个学期，并在由两个大学系成员组成的咨询委员会的指导下工作，每个委员会的一名共同主席两所大学。委员会主席必须是得克萨斯州农工大学任命的教
The Department of Agriculture, Agribusiness and Environmental Sciences offers a cooperative Ph.D. program in Horticulture, through partnership with the Department of Horticultural Sciences at Texas A&M University in College Station. The degree is awarded by Texas A&M University; however, much of the course work, research and graduate advising can be completed at Texas A&M University-Kingsville andor the Texas A&M University-Kingsville Citrus Center. Graduate studies leading to this degree can include any aspect of horticulture. Students in the program are highly encouraged to spend at least two semesters in residence at Texas A&M University in College Station, and to work under the direction of an advisory committee comprised of members of both university faculties with one committee co-chair from each of the two universities. The committee chairperson must be a faculty member with a faculty appointment from Texas A&M University.