I've taken the plunge and ordered/received a couple dozen cultivars of TB iris this year...for the first time. The others of this type that I've worked with previously were mostly shares of plants that were here already; likely ones that are nigh unkillable. I'm wondering why, if rot is such a big issue with a lot of these plants, aren't they seen more often mulched beneath with rock? Most garden images I see show bare dirt. I did see a stunning picture of gardens mulched with rock at one of the suppliers I purchased from, but it seems to be one of the few.
Any thoughts on whether or not I should do this would be greatly appreciated.
