Drimia altissima has a long inflorescence, up to 1m, that is very conspicuous amongst grasses during September and October. The flowers are in a dense terminal raceme and is white with a green midline on the outside of the tepals and has a very distinct shape. Flowers open in the morning and usually close by midday. The large bulb is often half above ground with tough, overlapping fleshy scales and is very hardy and needs little attention.
Drimia altissima has many medicinal uses. The tough leaves, up to 30 × 3 cm, are absent at flowering time.