This grower is fairly sure of this plant identification.
Evergreen plant with white flowers in summer followed by attractive seed pods.
Libertia genus. These are about 20 species of perennials, they produce tufts of grass-like leaves, They grow easily in temperate climates and produce upright wiry stems which bear clusters of small white iris-like flowers in the spring and summer. They are frost to half hardy and will need a sheltered, sunny or partially shaded site with well drained soil. Propagation is by division in the spring or by seeds in the autumn or spring.
They are moderately frost hardy, and they require a sheltered, sunny or partial-shaded position with well-drained, peat soil, that has plenty of moisture in the spring and summer. You can propagate by division in spring or from seed in spring or autumn.
Grown for their foliage, decorative seed pods and flowers. Suitable for coastal conditions.