The parent plant of this vegetative sport has proven to tolerate wetter conditions so long as the soil is freely draining or the plant is on a slope or mound, otherwise it can be planted in nearly any soil type and has been also tolerant to windy, salt laden situations and moderate frost - should prove hardy to around 16° F. Cutting back of this plant is not required, but it can be trimmed back using a sharp shear, knife or power trimmer to cut foliage to about 4 to 8 inches above the ground; avoid doing this in mid-summer or when plants are drought stressed. Should benefit from a light feeding with a general fertilizer prior to winter active growth.

This plant is a sport of the larger Lomandra longifolia 'LM400' that is marketed under the name Nyalla. It was a mutation that occurred in vitro in a micropropagation laboratory and we received the plant as 'LM400'. We later named it after discovering that the plant was not growing as tall as 'LM400' and shorter leaves with a more upright habit. With its tufted short leaves it and Lomandra durability, we thought it might prove to be a nice plant to replace Blue Oat Grass (Helictotrichon sempervirens) in mass plantings in locations in Southern California where this desirable looking grass does not survive very long. The plant however was not nearly as strong growing as Nyalla and we discontinued growing it in 2021.

The genus Lomandra has long been placed with the Australian Grass Trees in the Xanthorrhoaceae or related Dasypogonaceae and more recently in its own family, the Lomandraceae, or combined with the Cordyline into the Laxmanniaceae, but current treatment is to put it in the subfamily Lomandroideae in the Asparagaceae. The name Lomandra comes from the Greek words 'loma' meaning "margin" and 'andros' meaning "male" and is in reference to a circular margin on the anthers. The specific epithet means "long leafed". 

Information displayed on this page about Lomandra longifolia 'Steely Slim' is based on our research conducted about this plant in our nursery library as well as from information provided by reliable online resources. We also include our own observations made about it as it has grown in the nursery gardens and other gardens visited, as well how the crops of this plant performed in the containers in our nursery field. We will also include comments received from others and welcome hearing from anyone who has information about this plant, particularly if it includes cultural information aiding others to better grow it.