This short course is built around plant materials found at international grocery stores, farmer's markets, and the produce sections of mainstream supermarkets. The purpose is to help teachers learn to 'harvest' an abundant resource for plant study in their classrooms. From biodiversity to ethnobotany, ecological imperialism, and tropical biology, we will explore the incredible symbiosis between plants and people that has not only shaped human culture but also the very complexion and distribution of life on earth. Plant science is an essential curricular topic but presents significant challenges to the classroom teacher. For some children, plants seem boring. To many, plant experiments in school science produce infelicitous results. And yet, there are other possibilities. The botanical resources found in market venues across the country offer incredibly useful specimens for study and can also inspire the design of important bridges that connect culture, history, and science. We will visit a market nearby, survey botanical diversity in the aisles, prepare materials for propagation, conduct a short investigation, and discuss the web of connections offered by ethnobotany, economic botany, and ecological history. These activities have been implemented in classrooms from elementary to undergraduate and in settings from Kansas City to Kuala Lumpur.