New Zealand flax is an evergreen, clumping perennial. It features sturdy, sword-like, brightly colored leaves in upright clumps. Colors can be green, pink, red, orange, black, apricot, gold and a variation of color usually mixed with white. Leaves are creased down the middle creating a V-shape. Panicles of flowers appear above the foliage on top of strong flowering spikes in summer. Plants in containers grow a lot smaller and almost never flower.