This a robust perennial grows to 1.5 m in height and is often found growing in groups. The leaves are soft and basal, yellow to dull green, and are strongly keeled with finely toothed or smooth margins. Poker-shaped flowerheads are borne on tall stalks from midsummer to autumn. Initially pinkish red to green flower buds appear, which are then followed by the greenish yellow to yellow flowers. They are neatly arranged in a dense inflorescence. From a distance the floral arrangement may be mistaken for that of a grassland aloe. Flowers are followed by greenish capsules, which contain green seeds that turn black as they mature.This is an attractive plant, with showy greenish yellow to yellow flowers and long, narrow leaves. Linearifolia means long, narrow leaves. It is suited to temperate gardens where it forms a strong contrast to small- or round-leaved plants. It grows well in rich soil in an open, sunny position or partial shade. It makes a brilliant display in a garden and the flowers last for a long time. The showy, bright-coloured flowers are ideal for adding a splash of colour to an area or making a bold statement. This plant can be used at the back of a mixed flower border. Flowers of this species also make excellent cut flowers. This is a water loving plant that is also ideal for bird garden. Named for Johannes Hieronymus Kniphof ( 1704-1763) a German physician, lecturer, professor of medicine, then dean and rector till his death.