You Will Get 10 Seeds Muhlenbergia Capillaris Pink Muhly Grass. It is a beautiful perennial grass that is becoming quite popular.. The plant grows up to 6 feet tall gets unique graceful seed heads in late summer to fall and great green foliage all summer.. Muhly Grasses are typically hardy to zone 5.. These beautiful plants grow best in full sun to part shade.. They would make excellent additions to your rare plant collection, or just make a unique statement in your yard.