First fact about worm composting in garden beds is that Red Wiggler worms are simply composting worms and not soil worms.
Meaning, you have to provide them a habitat.
When you dig a hole in your garden, you have to make sure that you have the best location.
Remember that Red worms are not susceptible to too much heat and cold thus, a temperature of 15-25 degrees Celsius should be maintained.
Second, the basic needs in worm composting remains the same.
When the hole is prepared, you can already put in all your organic materials.
You can have kitchen scraps, vegetable peelings, tea bags, coffee grounds and more.
You can use a shovel to break those into pieces.
Know the restrictions in feeding the Red Wiggler worms though.
Third, when you do vermicomposting in garden beds, expect that the compost pile may not be as aesthetic as you would want it to be.
Unlike with a worm bin where you can place it under your kitchen sink or your garage, this process will be where your garden bed is.
The only thing that you can do is add straws or coconut coir at the top of the pile so that your garden won't look too messy.
Lastly, you have to consider this truths about worm composting in garden beds: you have to keep the pile moist as you would do with a worm bin.
This will help the worms balance the heat from direct sunlight.
You can also occasionally mix the pile to achieve best results.