The beardless iris we offer all require differing conditions for growth. They are fully hardy in the UK, but because their origins are not the same (unlike bearded iris), they require different growing conditions.

Siberian Iris
These are the most shade tolerant iris, but even so, they still require a few hours of sun each day to thrive. They like acidic growing conditions, and their roots should never be allowed to dry out, although they do not need to stand in water either. 

Louisiana Iris
These are endemic to the deep south of the USA, where they live in ditches created by the run-off of rain water. They do best in very damp, sunny, acidic, humid conditions. Not conditions readily found in the UK, but check out FLEUR COLLETTE LOUISE.

Spuria Iris
These are beardless versions of bearded iris, as they like the same conditions, (sun, alkaline pH) and some varieties can go summer dormant. 

To plant all these iris types, take out the top spit (spade depth) of soil, and set it aside. Loosen the next spit of soil with a fork, and then fill the hole with the compost of your choice, using the correct compost to help adjust the pH. Thoroughly mix the loose soil and the compost, and then tamp it down well. Return the top spit of soil to the hole, which should now form a mound. With a trowel, make a hole for the iris, but before planting it, drop in 1x75mg tablet of dispersable aspirin - available from Boots at about £1.20 for 100. (PLEASE - no comments about headaches - I have already heard them all!) Put the iris rhizome into the hole, with the top of the rhizome 2-3cm below soil level. Spread the roots out in the direction they seem to be growing, and then fill in the hole, firming the soil down well to anchor the roots firmly in place. Give the iris a good watering to settle the soil around the roots, and except for Spurias, keep them watered until the autumn rains start.