Invasive worms are spreading across Oregon, threatening gardens and forests | Oregon Field Guide

An invasive worm species from East Asia is quietly transforming Oregon's soil — and gardeners are struggling to stop it. Jumping worms consume leaf litter at alarming rates, leaving behind dry, crumbly castings that repel water and choke plant roots. Scientists warn the damage could spread far beyond the Willamette Valley. Can anything be done to stop it?

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