I apologize for this delayed reply to your gardening question and hope it is still helpful to you. They may not survive very long in the garden but it really depends on the soil condition and moisture content. I would split them into two bins and then watch the bins to see how they are doing. They won't eat each other but a large number just means they finish up the newspaper and food in the bin faster and thus need a changeout of bedding material more often.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
Q&A Library Searching Tips