Re: Composting and the BSF
Hi anniebluesky, welcome to our forum.
As I read your post it was clear you had the perfect combination of elements in place to attract BSF if they are found in your area. For some odd reason they seem to love coffee grounds and of course the vegetable waste is also attractive. If you don't mind would you please tell us where you are located, at least generally? We're always trying to expand our knowledge of the BSF range. Submissions to our BSF locator map are always appreciated as well.
1. Can I turn the pile? If so, how often?
I'm not an expert on traditional composting but I don't think you will hurt the BSF larvae by turning the waste, at least not enough to worry about. Since your unit isn't designed to contain the larvae they will come and go in waves probably, but if you keep adding the vegetable waste you will have more females laying eggs to replenish the colony.
2. How do I use the compost for my garden?
Again, I don't think you need to alter your plans much. BSF will not harm your garden as they are not designed to eat fresh produce. Any larvae that get transplanted to your garden in compost should simply crawl away in search of rotting material to eat.
Please feel free to ask any questions and I hope others with more composting experience will chime in.