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.
Instead, try to get them in the ground within a week.) You'll probably get about four days of bloom from each plant, but, in the garden, the irises seem to stagger their blossoms somehow. You'll typically have color for several weeks. After the blooms are gone, cut the stalks off, right next to the rhizome.