Now if I am shipping or receiving plants sent in the mail I trim the foliage and expect it to be trimmed when the plants arrive. However, if I am digging and separating plants in my own garden it can be a different story. If I dig a huge clump, whack it into say four large pieces, I just replant the four large pieces and do not trim the foliage. If I decide to really do a complete dividing of the plant down to two fan sections, then I will trim the plants. Of course, sometimes because a plant is so big, I will trim it before digging just to be able to see where to dig.