This is an ornamental grass, Muhlenbergia capillaris. The pink "muhly grass" grows to 3 feet and 4 feet wide. Good for planting zones USDA 6-9/ Drought tolerant too. See more "dry garden" plants on my blog, EdenMakersblog.com
First, measure out the length you need. Locate the end of a thread at the point where you'd like to cut the burlap. Gently pull the thread, slowly working it out of the fabric. Sometimes the thread can snap. If it does, just find the broken piece and continue to gently pull. When the thread is removed, you'll see the mark and cit along.