Meredith Corp. announced today it will partner with Joanna and Chip Gaines — owners of the immensely successful Magnolia brand — on a new lifestyle magazine. Launching in October with 400,000 newstand copies nationwide, the magazine will also be available for purchase online. The quarterly lifestyle magazine, which has not yet been named, will feature entertaining, holiday and seasonal celebrations, gardening and outdoor living, family, food, and healthy lifestyles. The Texas couple own the popular Magnolia Market in Waco and have developed real estate, construction and design firms under their Magnolia brand.