TB iris pull themselves down?
I planted my first set of TB iris last August. I know to plant them with the rhizome in the "sun" or right at the surface. I went out to clear away the winter mulch from them and low and behold, they pulled themselves down farther! They must be a couple inches down! I tried clearing some dirt away from them with my fingers but it doesn't help any. They are rooted very firmly! Anyone else have this problem? What did you do?
I have Blue Cheer, Orange Celebrity, and Orange Fire from Blue J Iris.
Also, my dwarf bearded irises are looking crowded. When do you separate and replant? They have been in the ground only 2 years.