I would cover the area with newspapers four to six sheets thick and cover the newspaper with shredded leaves. If you don't let them dry out they will not blow away. I use shredded leaves on my veg beds in winter and they stay put. Whole leaves blow away. You could use evergreen boughs to further anchor the leaves. Although it's more work. Preen and straw will work but be sure you get straw not hay. It's filled with seeds. Best And Happy Yardening, Nancy.