Join groundwork to learn about Invasive and Non-native (INNS) plant species and how to record them via an app!

Groundwork are looking for local volunteers to keep a watchful eye on the River Colne in Watford and report any problems you might see while you're walking along the river.

For this session we will be using INNS Mapper, a publicly accessible mapping app for recording Invasive Species.

This will be a short evening walk along the river to get comfortable with using the app, and some real-work experience identifying invasive species in the wild - we will be targeting Himalayan Balsam at this site.