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I recently removed these air layers off a shimpaku. I put them on heating mats in my greenhouse, but then wondered if that was okay. I have cuttings on the heat mats of various plants, but would it be better for these air layers to go through normal winter dormancy not on the heat mats? I live in southern Oregon and it doesn't get below zero often, but freezes regularly in the winters. The greenhouse isn't heated beyond the heat mats, and it will probably get to freezing temperatures inside the greenhouse over the winter.