Posted: 30/04/2014 at 23:48
Feathery? How about artemisia Powys castle? Lovely silvery soft foliage. Perfect comfrast to grasses. And lavendars, the ultimate in tactility plus scent and colour and, again, work well with grasses. And santolinas . Grey aromatic evergreen mounds
However, perhaps too many ideas are dissuading you from what you really want, viz., a billowing "wavy", swaying, tactile, feathery edge to your pathway. Stipa Tennuissima would give you what you want and look good. Sometimes I have too many ideas ....perhaps over complicated ones.......when the simple ones may be best. If you want a grass pathway go for it.