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.
Irises may not bloom for several reasons. * Too much nitrogen-cut down on the nitrogen element in any fertilizer that you might be using. * not enough nutrients or water (but be sure not to overwater, though, which can encourage rot). * not enough sun-they should get at least 6 to 8 hours of full sun each day.lso, iris stop blooming when they are crowded and need to be divided every 3 to 5 years. Divide and replant in July, August or September when they are sleepy due to the heat. When you replant, ensure that the iris plants have good drainage. Water can not stand in the beds.