Caffeine is a common application in compost. How does its presence interact in the garden? Will an exogenous application of caffeinated compost impact plant growth and development, and will caffeine uptake occur? Between caffeine and control treatments of compost, my research shows there is little difference in the growth and morphology of green beans. However, as a toxic alkaloid, caffeine in composts may still yet provide a twofold effect on pest control (compost and plant).