Thanks for your question.

I’m afraid that I have no knowledge about European night crawlers. Neither do my colleagues. Is there some reason why you would want to have them in your garden? What little information that I can find about them is that they are a species that has the potential for being highly invasive. It appears that sometimes they are used in composting. I’m afraid that that I cannot provide you with any scientific information about them. If you want to use them, do so at your own risk.

Thanks for consulting with us. Good Luck.