Brian Mathew schreibt, daß I. minutoauraa in eher torfigem Substrat nicht glücklich geworden sei, und Fritz Köhlein empfiehlt für diese Art sonnige Steingartenlage mit guter Drainage. Interessante Gedanken finden sich bei James W. Waddick in „The Iris of China“ im Kapitel über die Series Chinensis, zu der die beiden Arten gehören. Der Einfachheit halber zitiere ich hier die ersten beiden Absätze komplett:
**********
These small irises seem to be plants of open grasslands and forest edges. Hardy and sturdy in their native environment, they have resisted cultivation for various reasons. Because they are all quite small and delicate looking, they are often given protected sites, shade, and extra care. I suspect that these plants of open, exposed areas may actually require somewhat harsher conditions than they are usually given – full sun, summer drought, and no mulch. They tend to be evergreen which may be an adaptation to their small size. That is, they retain their foliage for as long as possible into the winter to continue photosynthesis because their rhizome, the main energy storage organ, is quite thin and small.
Because I. henryi and I. koreana are not in cultivation, I cannot give specifics, but they occur in fairly cold temperate climates and environments. Iris rossii and I. minutoaurea are both quite hardy. There are frequent reports of the lack of flowering in both species, but owing to their northern distribution, I suspect they require cold winters for proper bud development. I have grown I. minutoaurea in full sun and with full exposure to 37.8°C (100°F), intense summer sun, and –29°C (–20°F) winter cold, unmatched, with good bloom. From an initial planting of three or four fans, in four years I have more than 100 fans. I had the first bloom in the second season after planting and 15 blooms by the third season. The planting has bloomed every year since, but because it is quite small it is not spectacular, and care must be taken to keep it from being overgrown or weeded out.
**********