The worms in our garden are highly active in the spaces between the paving stones in the patio. Churning up the soil, uprooting the moss, generally making a mess. The pavers are set in sand, but it's mixed with dirt and there is a clay soil underneath. Guess the worms are coming up from that soil. I've tried watering them out and throwing them back into the flower beds, but they don't seem to stay there.

Does anyone have any ideas on how to discourage the worms from tunnelling between the paving stones? I'm wondering if there are plants they don't like or won't tunnel through, or safe substances I could treat the soil with, etc.? I don't want to hurt them, just encourage them to party elsewhere ;)

Thanks!
Best,
Jen