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.
Best Answer: You should cut them back right after they finish blooming . Onlt cut back the stem that the flowers were on , unless you have any tattered. or dead leaves ... Source(s): In general, iris rhizomes can be planted or moved at any time the ground can be dug. Digging within a month to six weeks of bloom time is likely to adversely affect the bloom but the plant will do fine.