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.

i just signed up to the forum but thought this was as good a time as any to say hi. i luuuuv pickles! :) it would be a very sad day for a pickle jar to go bad :( vinegar has a ph of around 3? worms need something like 5-9 from a quick web search - i'm wondering if you might be able to stick them in a blender with some ? baking soda to neutralise the acidity - worms already use calcium carbonate in their digestive system afaik at any rate if you start small, with maybe half a pickle's worth?, you can't go far wrong i'm a big fan of precomposting but it'd be fun to see what a blended pickle baking soda mixture would look like :P cheers! and hello :)

Wonderful advice! Last night hubby threw out some stale bread and I was wondering if I should save it. My bin is on the dry side because I added some old potting soil and dry leaves from some dead plants (forgotten in the basement, oops) Those things were really dry! I added a little water but may add some more water or wet foods. I added a little oatmeal and saved the can near the worm bin and will add it a little at a time. I hate to throw it away it was a large plain container of oatmeal for making cookies (that we forgot to make) I am thinking of going to goodwill or another thrift shop and getting an old blender for the foods to get chopped up. The bread could go in too. Thanks for the help!!! Karen

I don't know the first thing about VC that is why I was snooping around here today. Funny thing that caused me to do this is that about 1 month ago I too had about 20 pounds of grape must. I dug a hole in my raised bed & threw the musts in there & covered with soil. This particular area stays fairly wet as I am always dumping my dog's water bowl in there 3 times per day. Yesterday I was getting the bed ready for winter veggies & when I dug up the area where the grape musts were buried WOW! worms! hundreds of them in just one shovel turn. They were red in color. I quickly turned them back over to the way they were. I figured they must be good for the soil. Hence my sudden interest in worm composting.