I'm not an expert, but I've always been told to dry in a dark place, I'm not sure how important that is, but the greenhouse may not be the best place? Are you trying to dry it more slowly, or just trying to be sure that with all that density it dries evenly? And how much control do you have over the humidity? If you have a space that you can control RH, then there might be one approach, if you are dealing with a preexisting amount of humidity then you would adapt the method to the circumstance. At least that's what I would do.