Teddahlia regarding the pile of dahlia stalks, do you pile them where they can naturally decompose? I wonder if pollinator insects would like wintering in there; that's why I asked. If I could effect one thing on the land where I have a garden space, it is to get the owners used to the idea to leave some 'wild' places on the edge of the wetland woods and not weed-eat and mow everything to death and kill all the beneficial insect queens by gathering piles of debris, branxhes, dahlia stalks - and then burning it all. So far, no luck.I believe this might correlate with our lack of pollinators and beneficial insects but maybe this issue is more about disappearing habitat and over development as well.