How to Grow Large LA. Iris Rhizomes

In Louisiana Iris by Christine Moore

Louisiana Iris Sweet As Candy

Louisiana water Irises are easy-to-grow aquatic plants grown from rhizomes. These resilient plants may be cultivated in pond-immersed containers or in your flower garden. From harsh, frigid frosty winters to warm, tropical locations. Louisianas thrive in a broad variety of climates in Australia.

When the winters in Australia are mild and warm, Louisiana Irises are evergreen. In areas where winters are very cold and icy Louisiana Irises will constantly remain semi-evergreen during the winter months.

Louisiana Iris has upright long sword ready leaf blades and long sturdy flowering stems with showy flowers. The flowers can be pendant shape or recurved others have short erect standards.

Breeder Peter Jackson’s modern varieties are notable for their big blossoms with thick textured petals, magnificent ruffles, petals horizontally flaring, laced blooms with elegant steeple signals.

Plant rhizomes of Louisiana Iris 5cm below the surface of the soil to avoid sunscald. If the hot summer sun strikes bare rhizomes planted above the soil, this can cause the rhizomes to become mushy and eventually rot away.

Louisiana Iris may also be planted in standard garden beds however, they must not be allowed to dry out. They must be consistently saturated with a great deal of water. They must also be mulched to retain moisture during summer and winter.

If a shortage of water causes your Louisiana plants to go dormant in the summer, the plant will be weakened and flowering will be affected.

Late summer and autumn is the optimum period to lift and divide Louisianas. Depending on the size of the pot you may have to do this every year, large pots not so often.

After flowering finishes in November, we like to wait until March to allow new offsets to be mature and flowering size before offering our Louisiana Iris hybrids and native plants for sale. After this, rhizomes may be safely dug up and replanted at any time. Although it’s not a good idea before flowering time, since this might hinder full bloom.

Spring and autumn are the vigorous growth seasons for Louisiana Iris and become semi-dormant in the summer months. If not watered they can become dormant. If left to dry out for too long during summer chances are the plants will die.

Important Factors – LA. Irises Grow and Care

Prepare an acidic humus-enriched soil with a pH of 6.5 or less
Louisiana Irises should be planted a metre apart.
Maintain the soil acidic at all times.
Use a slow-release fertiliser particularly prepared to nourish acid-loving plants low in nitrogen.
Gently fertilise the plants twice a year, once in early spring and once early autumn.
Each year top dress with more well rotted manure.
Remember to always keep the plants well watered.

Our online store is stocked with a beautiful selection of colourful Australian hybrids and native Louisiana Irises.
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