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.
Perennials that bloom in the spring-astilbe, peonies, bearded iris, bleeding heart and others-can easily be divided and moved in late summer or fall. Those that have begun to show signs of entering dormancy-browning foliage-can also be moved in early fall.