The earthworm population is pretty self regulating. Only as many as the available food source will support will stay around.

How neat! Know the feeling! After a few years of adding OM to my soil, it was as you describe ... teeming ... the the plants seem to like them. I call them my hired hands ... they dig, stir, mix and fertilize and I sip my tea in the shade......like a plutocrat.... lol

Congratulations! It feels good to see them!

Congratulation!!
As most of the persons on this forum already know, I have tons of coffee waste. No worms in the deep pile,just mushrooms & fire ants.
In the raised beds I get 25-50 green fruit beetle grubs per shovel full of soil. Some one said that earthworms was proof of good soil/organic matter. I wonder if grubs count, being they are a life force, that eat organic matter.

Grubs are not the same as earthworms, jolj.

Who said this & why .
They eat organic matter & they loosening the soil.
So what make a foreign species(earthworms), better then a native species(green fruit bettle grubs).
I think you are slitting worms, myself.:-)

Got earthworms around my fig tree.