It depends on how you are running your system. If you have a stacked system (where you have bins or trays on top of one another) bedding is added in layers on top of the food. If you have only one bin or tray (where you bury the food in a different spot each time you "feed") you would have to stop adding bedding at some point in order to allow everything to "finish" composting. This is why most people who have had bins for awhile have more than one. You just take worms from the first bin to "seed" the new bin, and then allow the first one to finish. Hope this helps.

"bedding" is the base of the system, like soil in the garden, the feedstock is the waste you're trying to get rid of, which will vary over time, especially if you get sidetracked for a few days .... adding more bedding keeps up the volume of the bin, is used to cover feed additions to keep them from attracting other decomposers and prevent drying, and it's necessary to set up the environment for both the worms and the bacteria that change your scraps to worm food .... ultimately the bedding is also food - paper, cardboard, sawdust will all decompose and get used, coir and peat aren't as useful in that respect because they don't attract as much bacterial activity

Bill

Thanks for the responses. I'm a happy composter!