The workshop covered the indoor composting method known as vermicomposting, in which worms are enlisted to speed up the decomposition of organic material, eating through scraps of it and excreting the “castings” that make up compost. (There are also commercial composters like the NatureMill, shown in the article below.) The “condo” where this should take place is a 16 1/2-inch-wide, one-foot-tall bin with air holes in which shredded newspaper sits atop green trash like the ends of carrots. Despite the enthusiasm of the audience, particularly the children, as containers of compost and worms were passed around, some of its members seemed to have misgivings. “Will the compost bin attract roaches?” one asked. (Not if you don’t let the covered bin get smelly, he was told.) “What happens when you go on vacation?” (The bin can stay unattended for up to three weeks.)

A few were trying again after unhappy first experiences.

“Everything got disgusting in there,” said Rachel Franz, 25, who tried composting in Ithaca, N.Y., in 2006, following instructions from friends. “The worms started dying, and it got really moldy,” she said. “When I opened it, the worms were trying to escape.”

If the worms want out, said Carey Pulverman, the workshop’s instructor and the project manager at the Lower East Side Ecology Center, “something is wrong.”

Happy worms eat about half their body weight in a day, and the compost is ready for harvesting in about four and half months, Ms. Pulverman said.

But if the paper is too wet, she continued, seepage or smell ensues. Certain food and organic matter is bad for indoor bins because it smells while decomposing (meat and dairy), attracts mold (bread) or may introduce insects to the bin (dry leaves).

None of this deterred Ms. Franz, the failed composter, who this time around planned to set up her bin under the kitchen sink of her father’s three-bedroom apartment in Chelsea, where she lives part of the time. Her father, she said, was resisting.

Image Credit... Hiroko Masuike for The New York Times

“He thinks it’s going to be a lot of work for him,” said Ms. Franz, who studied environmental science and is currently looking for work.