Large numbers of undergraduates may be exposed to a discipline outside of their major via the service course. Without the restrictions of prerequisites, a service course like Indoor Plants welcomes students of all academic backgrounds and introduces them to the horticultural basics necessary for successful houseplant cultivation. Plant growth requirements of major species groups are discussed and over 75 individual species are learned by sight. Laboratories are designed to illustrate lecture concepts in a practical manner, and are tightly scheduled to the related lecture. Graduate teaching assistants have instructional and administrative responsibilities for their own class section but work closely with the course administrator in test construction, grading, and course refinement. Service courses like Indoor Plants have proven recruitment potential and serve an important marketing function for the discipline.