I feed my guys everything. Some people say their worms don't like lettuces but mine eat all that, and herbs, cabbage etc readily.

For the first time I fed them some tomato peelings. I looked the next day and they loved them! I wasn't sure, because of the supposed acidity but I feel confident now, in feeding them tomato.

Sherry

worms "prefer" anything that decomposes readily, anything that quickly attracts bacterial action and has ample moisture to keep the process going and keep the immediate environment moist - melon of any kind is ideal in all respects, and microbial action takes care of any acidity

Bill

What Bill said, but especially pumpkin, banana peel, inside of egg shells, melon.

In my bins, it would be a tie between pumpkin, cantaloupe, and watermelon.

Deanna

It's official. My worms love tomato skins. I fed them a bit the other day, and checked the next day. There were lots of worms underneath. I gave them some more and checked again today.
Lots again. So they got a bunch more tomato peelings.

There were even more than when I put the cantaloupe in.