An interesting iris relative, which forms evergreen clumps of narrow, almost grass-like leaves. Sprays of white (or less commonly blue) erupt on strong stems from within the foliage in mid to late spring. The larger green-leaved species and forms, make a good, often rounded focal point in a sunny border. Old foliage can be cut out, or treat like an evergreen grass and cut back to a low hummock in late winter. The forms with coloured foliage, tend to form much looser clumps as they spread by stolons. These do well in our Gravel Garden, but should take positions with more moisture-retentive soil. Full sun though is essential.
Although the flowers do attract some pollinators, especially flies, they don't appear to be highly sought after. And the foliage, not forming such coherent, long-lasting tussocks as some related species, provides little in the way of shelter for invertebrates. Some concerns are arising as L. formosa is becoming established outside of gardens in south-western regions: it would be prudent to take steps to reduce the likelihood of it spreading from your garden in such places.