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.
Iris unguicularis are low-growing clump-forming irises with beardless flowers that flower in late winter and early spring. Large clumps can be divided to rejuvenate them if flowering has become reduced at the centre of the clump. 1  Divide clumps in autumn, or wait until after flowering has finished in spring.