This document is the teacher's edition of a module containing 16 instructional units covering competencies for students with career aspirations in horticulture. It is designed to provide high school students with an in-depth perspective of both the technical and the commercial aspects of running a greenhouse. The 16 units cover the following topics: designing and constructing greenhouses; controlling the greenhouse environment; preparing growing media; propagating plants; maintaining plant nutrition; producing a crop; using chemicals in the greenhouse; identifying and controlling pests in the greenhouse; marketing greenhouse products; shipping and receiving greenhouse products; customer relations; performing general office work; maintaining greenhouses; servicing and maintaining equipment; managing the business; and applying safety regulations. Each instructional unit follows a standard format that includes some or all of these 13 basic components: performance objectives, suggested activities, basic academic skills taxonomy, handouts, information sheets, supplements, transparency masters, assignment sheets, assignment sheet answers, job sheets, practical tests, written tests, and written test answers. (KC)