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.
If there is rot at the base of leaves, that will also cause irises to fall over. Otherwise, it's very normal for iris beds to look untidy (and a bit ratty) after bloom. After bloom, you can cut the flower stalks back. Divide irises every 3 to 5 year -- about 4 to 6 weeks after the flowering period.e would not mow the iris foliage nor cut it back until after it turns brown and is dead. The bulbs are storing energy for next year so you want the leaves to nourish the bulb. After the leaves brown, they should just fall off. It's not pretty for a while but the beds largely take care of themselves.