The most overlooked part of any conventional wormery is the nursery. If you think about it a wormery is a practical worm farm.
In order to maintain or expand your wormery / worm farm you will need a constant supply of new worms.
This is all about where worms lay their eggs and what is an ideal place from a worms point of view.
A temperature nearly all year round that is not too hot or too cold. safe from predators, not too wet or too dry. Where hatchlings can munch away all day in safety.