I know this thread is very old, but it's one of the only really relevant links to come up when you google this. After never finding a satisfactory answer, I just tried it in my indoor plastic tote worm bin (made from 2 nested 10 gallon totes from Lowes http://www.lowes.com/pd_332449-61896-332449_1z0yly3__?productId=3276019&pl=1), and the worms adore sourdough starter. At first I thought something was wrong because every worm in the bin ended up in a giant, writhing mass where the starter was put down, but it turns out they were just super excited to eat it. It gets kind of hot, though, so be careful with quantity if the temp where you keep your worms is high. You'll see more condensation in the bin with the starter in there. I've put down up to 1/4 cup with no bad consequences to my bin. I don't know about larger quantities--I would guess it depends on the size of your bin and worm population. I had no problems with odor generally, but there can be a funk for a while if you uncover just the area where the starter is--probably because it can cause a wet, sludgy spot. I've since started to take out some older bedding and mix it into the starter before putting it down. The worms seem to prefer to eat the castings/organic matter/bedding that has soaked up the starter rather than eat the starter itself anyway, and it helps me control moisture better. If I notice that the spot with the starter is getting compacted and funky, I fluff it, and it seems to nip the problem in the bud. Anyway, I'm sure this is no help to the original poster anymore, but maybe this will help the next person who Googles for the answer to whether it's OK to feed sourdough starter to the worm bin.

pomme8916: it will depend on how big your container of lettuce is respective to your worm bin. I could throw a gallon's worth of rotting lettuce with the gunky "juice" into my 4' x 4' outdoor wormery and it would get absorbed nearly immediately. Throw that same amount into a 5 gal. mini-bin and I'd probably kill a bunch of worms. The "brown "juice" and has some fluffy white mold" is fine - no worries there even if it stinks. It's the quantity you need to watch. equinox's advice about adding bedding will definitely help. In fact, you could even soak up that juice ahead of time with some dry, asbsorbent bedding (egg cartons, cardboard). Andrew

If you have the space- building a conventional compost pile and running a hot-cycle will take care of a lot of weed seed and digestability issues with components. The down-side is that many local (notice that I avoided the word "native" :) worms will be introduced as well. I process a lot of material- so it happens in open piles outdoors. Turns out that in my garden I have so many worms that I need to re-mulch with shredded leaves several times in the summer! My vermicomposting, however, is greatly simplified by this approach. I simply pile materials between rows and cover with cardboard to prevent leaching nutrients, and let 'em at it.

Yes! Kinda? About the only things we shouldn't feed our wormies is the stuff we stuff down our own pieholes. Thing is, as with all foodstuff we introduce into the bin, we need to always practice that quality we've pretty much eliminated in our own lives.....moderation. Were those my walnuts, I'd mix some of them with other foods (blended? pureed? stirred?) Mostly lately I've been using an old garbage disposal set up with my potting shed sink that pulverizes all the fruits and veggies and coffee grounds and teabags to produce a cocktail that causes much excitement among the wormies when spooned onto a particular spot in the bin. Blending tends to create more feeding frenzy because they don't have to lay around waiting for a particular morsel to decompose into a consistency allowing toothless consumption. Feeding frenzy brings about increased activity in all worm pursuits....all of which consist of feeding, reproducing, and turning input into output. Chuckiebtoo Moderation, Diversity, Patience