Irises

Asked June 13, 2018, 9:32 PM EDT

I need to thin out my irises this year. How soon can they be dug up after the flowers are done to dry out to replant this fall?

Saginaw County Michigan irises flowers: annuals and herbaceous perennials

1 Response

Hello,

Irises continue their underground growth for about three weeks after blooming. The best time to divide your irises is during their semi- dormancy which is anytime from July through August. Replanting at this time gives the plants time to develop a good root system before heading into winter. This is also a great time to check for any diseased or damaged rhizomes and discard.

The following links will give you more detailed information:

https://www.extension.umn.edu/garden/yard-garden/flowers/iris/

https://www.irises.org/

https://www.extension.umn.edu/garden/insects/find/iris-borers/