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Also to know is, how long do you have to transplant irises?
The best time to plant and transplant rhizomatous iris is late July through September. Iris loves the heat and drier weather of summer and the summer dividing will reduce the incidence of bacterial soft rot. Most rhizomatous iris should be divided every three to five years.
Thereof, when should you divide iris bulbs?
The best time to divide these plants is four to six weeks after they bloom -- midsummer to early fall -- every two to three years when blooming decreases. The foliage should be cut back into short fans and the rhizome lifted from the soil.
The best time to plant and transplant rhizomatous iris is late July through September. Iris loves the heat and drier weather of summer and the summer dividing will reduce the incidence of bacterial soft rot. Most rhizomatous iris should be divided every three to five years.