This document discusses using QR codes in extension demonstration gardens to provide plant and site information to visitors. It describes how QR codes work and how several public gardens have implemented them successfully. The author details setting up a mobile-friendly website with plant profiles linked to QR codes in their new extension demonstration landscape. QR codes could provide audio tours, evaluations, photos submissions and more. While awareness and technology barriers exist, QR codes allow customized, updatable signage for self-guided garden tours.