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.
Avoid high nitrogen fertilizers. Excessive nitrogen can promote bacterial soft rot in bearded irises. When you plant your irises, make sure the top surface of the rhizome is level with or just slightly below the soil surface. If you bury the rhizome too deeply, the plant may refuse to flower.Do NOT mulch directly over the rhizomes.aurief_gw January 1, 2013. Bearded irises can be divided any time after your last frost date in the spring, but many irisarians believe the optimal time to divide them is 6-8 weeks after bloom.