Eriophorum angustifolium - Cotton Grass
Eriophorum angustifolium, commonly known as common cotton grass or common cotton sedge, is a species of flowering plant in the sedge family, Cyperaceae. It is native to North America, North Asia, and Northern Europe, it grows on peat or acidic soils, in open wetland, heath or moorland. The stem is 20-70 cm tall, and has three to five cotton-like inflorescence's hanging from the top. Cotton grass will spread by both seeds and roots. Hardy and not frost tender.
I have mine growing around the base of my Twisted Willow. These plants are in a plastic pot (black rubbish bin) filled with soil that has holes a third of the way up and on the bottom. This pot is then placed into a large decorative container of water. I would recommond the plant kept in a large container as I have found mine spread quickly.
Cotton Grass was used in the past for making the candle wicks and for stuffing pillows. It was even used in wound dressings during the first world war.