The natural range of Fernald’s iris, Iris fernaldii, is actually rather limited. It is endemic to only the Coast Ranges from Mendocino County to Santa Cruz County. Although it grows well beyond its natural range, it is quite rare in cultivation. Within chaparral climates that are warmer than its range, it prefers afternoon shade. Its foliage is greener with irrigation.

In the wild, Fernald’s iris develops sparse colonies, typically mixed with other vegetation. Colonies are more compact with cultivation and exclusion of other species. Propagation is very easy by division, or simple separation of wayward rhizomes. Fernald’s iris can be satisfied with shallow soil or soil of inferior quality. Too much fertilizer may inhibit bloom.

Fernald’s iris grows only about a foot tall, with slender, grassy and grayish green leaves. Floral stalks stand a bit more vertically and slightly above the foliage. The typically white flowers are paired on each floral stalk. Flowers might be pale or buttery yellow, or, rarely, pale lavender. Roots are thin but tough. Rhizomes, relative to those of other iris, are slim.