I've had one batch of eggs right off. I've found that they like to lay against something hard they can dig under, so I added a rock that is sunken into the soil. The soil has to be soft and moist, too, so I try to "churn" mine periodically with a fork. Yes, they are a GPIMA but way easier to me than silkworms. Silkies always die on me, and Ferdinand doesn't really like them that much either.