When do I break off the stem of the Iris after they are done flowering?

Question

And when do I take the bulb out that flowered also?

Answer 1

After all the iris buds have bloomed on a stem you can remove it by cutting it at the base. There is no rush to remove the rhizome. Leave them in the clump for three years or more till the clump needs to be divided. Here's how:

https://www.gardeningknowhow.com/ornamental/bulbs/iris/divide-bearded-irises.htm