This grower is sure of this plant identification.
Seedlings of varying size from the large fluffy grass in the photo. In my garden it grows both in full sun but also in full shade underneath a birch tree.
Pheasant tail grass, New Zealand wind grass
Stipa arundinacea (Pheasant tail grass). This is a large clump-forming evergreen grass. It is grown for its attractive foliage and flowers. The leaves are long narrow and dark green tinged orange. In the winter, the whole clump will turn a rich rusty orange colour. In mid summer, arching stems of fluffy, pinkish-purple flowers will appear. (Syn. Anemanthele lessoniana.)
You can plant in full sun in well-drained soil.
Grown for their habit and the flowers can be used for dried arrangements.
Italics = data drawn from parent genus or speciesView Full Plant Finder Record