Hi everyone. Since it has been getting very cold outside i've been trying to come up with a good overwinter mulching idea for my small in the ground bog. At first i was planning on covering the entire bog surface with about a foot of straw. Then i read that straw can rot and spread mold to the plants. Plus it would be a huge pain to clean up in the spring. So then i thought about using pine needles but these would leave an even harder mess to clean up. Then i really started thinking and i came up with a pretty good idea. First off, I put rocks around the edge of my bog to make it more attractive and to cover up the excess liner. These rocks are about a foot higher than the bog's surface. So i thought that i would buy a few sheets of that blue sheet foam that is used to insulate houses, and put it flat over the top of the rocks. Then i would cover the foam and rocks with some plastic sheeting and cover the entire thing with about a foot of straw. Does this sound like it would provide good insulation from below freezing temps?? Also when would be the best time to do this?? I live in zone 5 and we're having highs in the 40's and lows in 20's and 30's right now. I was thinking that maybe early Dec. would be the best time. Thanks!!!