Mystery Graph: Japanese knotweed (Fallopia japonica)

Use this activity to kick off a Vital Signs investigation focused on invasive Japanese knotweed (Fallopia japonica). Use your graphing skills to figure out and explain what happened during a 3-week study of Japanese knotweed growth. Japanese knotweed’s early, aggressive spring growth helps it out-compete native species for sunlight, space, and nutrients.

Project Information
Grade Level: 
Middle school (grades 6-8)
High school (grades 9-12)
Resources I used: 
BBC News video on the VS blog: (Direct link:
How should others reference your work?: 
vitalteach, Mystery Graph: Japanese knotweed, Vital Signs Program, Gulf of Maine Research Institute, 2010