Fall leaves are great for your flower beds (and all other garden beds)! We have a leaf blower/vacuum. The vacuum sucks the leaves up and mulches them. I use this mulch to cover my flower beds in the fall (after frost, before and you are inviting mice and voles). The leaves help protect your gardens in the winter, and come spring the leaf mulch breaks down into a good compost. So instead of burning leaves or sending them all to your local landfill use them to mulch your flower beds.