As of June 2015, free rose afghan patterns are online at Crochet Kim, AllCrafts, Craft Elf, Free Vintage Crochet and Ravelry. For example, Crochet Kim offers both online and PDF versions for its crimson-rose afghan. Each square at Crochet Kim is 8 inches.
AllCrafts presents directions for a desert rose crochet afghan. AllCrafts squares are 8 inches. The site includes standard crochet abbreviations and their meanings. At Craft Elf, the rose afghan pattern uses 42 9 1/2-inch squares. The instructions call for dark pink for the roses, but the colors are ultimately up to the user.
Free Vintage Crochet has an American rose afghan pattern. Large flowers alternate with stems and leaves. Ravelry offers a rose trellis afghan and pillow instructions with a medium level of difficulty. Each square is 9 by 9 inches.