For the bearded (Pogon) section, choose a well-drained spot in full sun. Do not expect flowering to be as good in even light shade.
Limey soil is marginally better than acid soil, but this is often more to do with drainage than any actual need for lime and they are very tolerant.
Plant with the rhizomes only just below the soil surface, to aid ripening. After planting leave them alone to establish, clump and spread, lifting only to clean out old dead rhizomes and split up.
The species that we offer are all hardy with us in the UK, as well as in the Netherlands and Germany. Remarkably, this includes the Arabian I. albicans.
Available for ordering from Spring and Autumn lists.