Seeds from Carex testacea Prairie Fire Grass or Orange New Zealand Sedge. Growing 20-24″ in zones 7-9, this grass will only grow 2 feet across and is good for smaller spaces. One of the most popular choices for landscape use in New Zealand. This grass has tufted evergreen foliage with a clumping growth habit. The foliage is olive green with orange-brown highlights that appear with full sun at the tips. This Carex will also have that orange-brown color in the fall and winter months.