You’d think worms would just get on with it themselves, but many indoor bin owners find their worm population difficult to grow. Here are a few hints to get your worms doing the wild thing.
Make sure the worms are mature enough to breed. They make take up to 9 month from egg to sexual maturity. Look for the Clitellum or collar like area nearer to one end of the body, this holds the sex organs and will become clearly defined when worms can breed.
Worms need to be healthy and well fed to reproduce. Once they have a good food source, they should begin to lay egg sacks.
Temperature affects reproduction. Worms are cold-blooded and naturally are much more active at higher temperatures. If you’re having no luck with finding egg sacks, try keeping your bin at around 80 F or 26 C.