We are going to say that it is not too late to move your irises, however, with these caveats: Look ahead at your weather forecast and see that a severe change or cold period is not forecast. Lift and divide the plants at your earliest convenience (this is being written on Oct 3; sorry for the delay), when the sun is shining, especially on the new bed, warming it as much as possible. Cover the new transplants with a thick layer of mulch. Then add another inch or two.
We are going to say that it is not too late to move your irises, however, with these caveats: Look ahead at your weather forecast and see that a severe change or cold period is not forecast. Lift and divide the plants at your earliest convenience (this is being written on Oct 3; sorry for the delay), when the sun is shining, especially on the new bed, warming it as much as possible. Cover the new transplants with a thick layer of mulch. Then add another inch or two.