Most home systems succeed with Eisenia fetida or Eisenia andrei, both surface-dwelling specialists that tolerate crowding and frequent feeding. Avoid nightcrawlers, which prefer deep soil and may escape. Start with a pound for small bins, then let populations expand naturally as food and space increase.
Egg capsules hatch into tiny worms within weeks, maturing in two to three months under comfortable conditions. Adults steadily process half their body weight in scraps daily when balanced moisture, aeration, and bedding are present, making patient consistency more valuable than occasional heavy feedings.
Worms self-regulate according to food, airflow, and bedding depth, so overcrowding gradually stabilizes without drastic intervention. If castings accumulate faster than you garden, harvest more often, split the colony, or gift a starter scoop to neighbors ready to reduce kitchen waste together.