Relations and functions | Functions and their graphs | Algebra II | Khan Academy
I'm sure I read that leaves should be left alone for six weeks to strengthen the iris and create more offsets. They can be cut back, lifted and moved after six weeks. So if you can pot up the annuals and wait the six weeks, then move enough irises to plant your annuals at that time. Thanks Good ideas. Think I will wait 8 weeks, then lift some Iris and move thus freeing up space for annuals.
Irises sometimes take a year off bloom after transplantation to settle into their new homes, so don't be too disappointed if you don't get bloom the spring after planting. Irises moved before bloom will often lose their bloom that season as well, which is why it's best to wait until after bloom to dig and divide.