Swedish fast-fashion retailer H&M said Monday it plans to open its 13th Colorado location at The Shops at Northfield Stapleton this fall. The store, set to open next to the Ergo Aveda Salon, will cover 20,000 square feet and carry the company’s clothing lines for men, women and children. It will also include a “store within a store” section for fashion accessories. Colorado has provided the company a warm welcome since it opened its first store in the state at the Denver Pavilions in November 2011, said company spokesman Patrick Shaner.