Good for flower bed- Lay down a thick layer of CARDBOARD in your raised garden beds to kill the grass. It is perfectly safe to use and will fully decompose, but not before killing any grass below it. They’ll also provide compost and food for worms.
When we started our adventure of building (well more rebuilding) a 4 season greenhouse, we were sure that heating would be the most important ingredient in keeping the greenhouse from freezing in the winter. Guess what, it is not. Are you surprised?