German Iris seem to have a remarkable resistance to everything from pet disasters to rather poor soil conditions. Late March is the time that I start dividing and/or moving German Iris. These tough garden workhorses require division rather often to encourage the best show of flowers. The root structure of this type of Iris is a rhizome, resembling a lumpy, horizontal carrot. The foliage growth tip is at one end and thus indicated the direction of growth. When dividing or planting new rhizomes, try to plant five rhizomes per clump. The pattern is to align three (3) of the growing tips to the outside of a circle and the remaining two (2) plant with their growth tips towards the centre of the circle. The results provide a symmetrical, circular clump with larger blossoms on each rhizome and no naked centre.
March 25th, 2018