This video shows how to plant an iris. Be sure to select a spot that gets about six inches of sun a day to plant an iris. When planting more than one iris, be sure to space them about a foot apart. This will encourage them to grow tall. When you dig the hole, don't dig it too deep. Also, make a little mound in the center of the hole. Spread the roots of the iris over the little mound so that the hole drains and the plant doesn't rot. You want about a third of your rysem sticking up out of the soil. Fill in your hole, water well. Then fill in again where the soil settles over the drain. Now your iris is well planted.