There's no need to remove the turf - simply cover with a layer of cardboard or several thicknesses of newsprint & fill. Not to worry - the worms will find your set-up and take up residence quickly whether you put cardboard between your soil and mulch or not.

Al

Well we removed the grass already a while ago. The beds are in a new hoophouse and I wanted to start off weed free. Thanks for the thoughts!

As long as you have decaying matter in there the worms will come. My grandma use to wrap her potato peelings in newspaper and bury them in the garden for her "little worm friends".

Val

You know thats a good idea, i'll just do some pockets of my compost matter in there!

If your impatient (like me) you could always buy some fishing worms (red wrigglers are best for composting) and add them yourself.
most gas stations near a lake or river have them.
best of luck

Contrary to what many people seem to think Red Wiggler worms are seldom found in soils, they do not live in soils but instead live where there is a large volume of organic waste to digest. Adding Red Wigglers to your garden may be a waste of your money.

Here is a link that might be useful: About Red Wigglers

I collected some grass clippings for now to cover the beds. I dont want the soil to get too compacted before the plastic goes over the hoophouse.