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.
Trim out any dead or badly damaged leaves. Cut these back to the base of the iris or trim off dead leaf tips if most of the leaf is still green. Prune back the entire iris plant to within 6 inches of the ground after the foliage begins to yellow in fall. Remove the old foliage from the bed and dispose of or compost it. Spread 2-inches of mulch over the iris bed after trimming, if these are first year plants or if your area experience winter freezing.