These stunning plants like neutral to alkaline well-drained soils in full
sun, cool to cold winters and hot summers. They are extremely hardy and
require only light watering throughout summer. They appreciate a good slow
release fertilizer or organic fertilizer, but do not place water-holding
mulch directly on top of the rhizomes or they may rot.
They are best divided soon after flowering (Nov-Dec) or late summer
(Mar-May), but they will survive being moved almost any time. However, if
you must move then in Jan-Feb, be careful not to over water and induce rot.
They are best grown where they get full summer sun,
but in very hot areas they may benefit from some afternoon shade, especially
the rich dark colours.
