"Geoff & Heather" wrote in message
news:4497cd42$0$20683
breeding ground and they migrate from there to the garden. Whilst my
garden is full of worms, I never see those little mounds of dirt that you
mention and are common on lawns. Maybe the garden soil is nice and loose
so the worms don't have to break the surface to get a good air supply ??

Hello Geoff and Heather,

I'm not referring to compost worms that stay at the top- I'm referring to
earthworms that burrow deep into the ground.

I've got plenty of the former...