Louisiana irises will grow in most climates in Australia, in full sun or partial shade, so long as their water requirements can be met. Blooming from early Spring to early summer, they produce many large and colourful blooms. They require a rich acidic soil or potting mix, and appreciate having their rhizomes heavily mulched.

Louisianas may be grown in a garden bed if the soil can be kept sufficiently moist all year round, but they excel in a bog garden at the edge of a pond, or in pots submerged in the pond.

For growing in pots, a camellia potting mix is suitable, with plenty of well rotted cow manure, and a slow release fertiliser mixed in. Further regular feedings can be given in the pot, or directly into the water surrounding the pot. Never add lime to the soil, or any fertilisers which contain lime. Large pots are best, as these plants rapidly form clumps. Regular dividing and re-potting will be necessary for best effect. Pots may be submerged in the pond, or in a container of water that holds one or more pots. The rhizomes are happy to be covered by water.

If growing in the ground, the soil should be dug deeply and plenty of compost and well rotted manure mixed into the bed. Rhizomes should be planted with about 5cm of soil covering them, and will find their own position once they start to grow. A heavy mulch provides feed, keeps the weeds down, and shades the rhizome from the hot sum to prevent scorching. Rhizomes should be planted at least 1 metre apart to allow for their rapid growth, and care should be taken to prevent the stronger growing plants over growing weaker ones. A deep watering once a week is essential in dry weather, and a drip watering system would be advisable for these water hungry plants.