Requires a well-drained lime-free soil. Requires a moist soil, growing well by water. Grows well in light shade. Plants resent root disturbance, any moving is best done in early September. Hybridizes freely with other members of this genus, particularly other Pacific coast irises. Not all provenances of this species are hardy in Britain. Members of this genus are rarely if ever troubled by browsing deer or rabbits.

None known

Seed - best sown as soon as it is ripe in a cold frame. Stored seed should be sown as early in the year as possible in a cold frame. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in the greenhouse or cold frame for their first year. Plant out into their permanent positions in late spring or early summer. Division, best done after flowering. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring.

Sunny grassy to woodland slopes below 1000 metres in California.