I am working on getting it bigger, turn it into an additional income stream.
They will eat almost anything that was organic to start with, though onions, citrus, and meat should not be fed indoors - takes too long to rot. Produce stands and stores throw enough away for most small growers, and they like USED coffee gtrounds. You can buy worm food from purina, which is mostly corn flour,calcium, some vitamins, ground up very fine, not very expensive, for a boost.
I collect, microwave, and grind up eggshells to a find powder, that provides them with grit to grind their food. Aged horse manure - so they don't burn up - provides not only bedding but food, and is free in many places.
Any rinds of cantaloupe, watermelon, leaves, etc go into a bag and are frozen for a few days, then either buried (reduces smell) or put out in a compost pile - I then feed finished compost to the bin, and they break it down and turn it into useful fertilizer and humus.
I too was giving away some flower, but this also makes a timely gift, one more thing they don't have to buy. Especially here, as growing has become a much more reliable way of getting your meds. So until the fascists are out of power at the state level, the fact that they can't check every closet in the state every 4 months works to ones advantage, one I have used for over 40 years.