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Blue Flag Iris Seed Propagation #215828

Asked October 06, 2014, 4:08 PM EDT

I have Blue Flag Iris seed which I intend to seed and produce a naturalized scape around the perimeter of two bio swails. Do I scarify or stratify the seeds first and how deep / far apart should I seed? Is straw mulching advisable? Do rodents or birds threaten to consume my plantings? I reside in the Sun River area wetland flood plain. Thank you for your attention.

Deschutes County Oregon

Expert Response

Hi, Here is a link to the website you can use to learn more about propagating blue flag iris ( Iris missouriensis). http://www.nativeplantnetwork.org/network/ViewProtocols.aspx?ProtocolID=94  Cold stratification is suggested, see website link.  I am not sure if you will have any problems with birds or rodents, if the seeds are lightly covered with soil , then probably not. I do not think that you will need to put straw mulch on top of the seeds in they are lightly covered with soil. 


Thanks,  Amy Jo

Amy Jo Detweiler,  Professor and Extension Horticulturist Replied October 07, 2014, 5:42 PM EDT

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