We bought an old farmstead where there was a flower garden on the outside edges of a large garden area. The various plants & flowers bloom all year...it is quite beautiful! There are many, many Iris plants planted in color groups..some types I've not even seen in catalogs. They are so crowded that bulbs..or tubers are on top of the ground. What is the best way to divide & transplant some of these flowers? Do I divide the plant...or transplant the bulbs? Once the soil warms they will start coming up....so when is the best time to move them? Also...are they toxic to livestock? That will determine where I transplant them.