Home | PRE — Plant Risk Evaluator

PRE is a science-based online tool to evaluate ornamental plants and measure the level of risk for invasiveness in a region. Visitors can browse the published evaluations, view the plant list, and read about our history and methodology. If you are a plant specialist, please consider joining our growing PRE community. Welcome!

Welcome to the beta 2 version of the PlantRight Plant Risk Evaluator (PRE) website. If you are involved in the research, development or distribution of horticultural plants we hope you’ll explore the site, get to know us better, and join our growing PRE community.

Read more about About PRE

Latest News

Announcement: PRE has a public face now

Posted by: Dave Waetjen on 2025-06-06

The PRE Technical Advisory Team is pleased to announce that evaluations that are created by this tool can now be viewed and downloaded by the general public, providing a new level of transparency in this work. The tool is running on an updated version of the web framework, and there are some important changes made.