It's a Great Time of Year to Plant Carex!
Roy Diblik uses Carex in most of his designs. They are a great living mulch that would, if he had my way, replace the layer upon layer of wood mulch that is so commonly used in the U.S. But Carex growth rate, growth habit & reseeding tendencies vary widely from one to another. Here are a few of his favorites.
https://www.youtube.com/watch?v=qlI6pY8Ms_k