An alternative to DIY if you do not have time or know-how to do it yourself is to buy rustic burlap flowers. Here are some different styles. There are links to look at or purchase each on the web page.
Burlap Roses --- strip of burlap, glue gun; fold burlap in half lengthwise, roll burlap tight multiple times (for the center) and then begin to twist the burlap away from the centre until out of burlap, glue. Done.