That's not a Siberian iris - foliage is wrong and they grow in rather dense clumps rather than individual fans like the photo shows. I'd suspect your plant is yellow flag iris, Iris pseudacorus.

Yellow sibes are not all that common and tend to be quite pale in color (compared to the intense yellow of the flag above). They are grouped in with the Sino-Sibes and get their parentage from I. wilsonii and I forestii.

Ah, well, possibly that might contribute... I have been taking care of it with my other perennials as I thought it enjoys more water and some mulch. However, that might be for Siberians. It gets mulched and if it doesn't rain for a few days, I turn on the weeper hose for the entire bed. Should I treat it more like a TB and make it drier with no mulch?

I am creating a drier garden in front of my fence. Would it respond well to being divided in the fall and going in front of my fence? It would get fuller sun and rarely supplemental watering.

iris pseudacorus is a water iris. It will grow in standing water but will tolerate ordinary garden conditions just as well. It is an invasive species in many areas and planting it well away from any water source and in drier conditions can reduce its spread.

Maybe slightly less vigorous :-) But they revert to the species rather readily.

By revert you mean the seeds, correct? Either way, I am seriously reconsidering this plant. There are some gorgeous tall purple irises I saw on my walk recently, maybe I will post a picture and kick this possible invader out.

No. I mean the leaves will revert to solid green and the plant becomes the original species and assumes its natural vigor.

The variegated one is not a hybrid - just a different, variegated form of the species. 'Holden Clough' is a psuedacorus hybrid (with I. chrysographes) but this too has aggressive tendencies and can also revert to the species.

Oh, yikes! Ok then, I guess I am bagging and trashing.

Better safe than sorry

Thank you so very much for this information!

Would this be a bad time to drop in and say that I'd love that for a huge pond project? You know, if it's not already in the trash....

Sorry!

LOL! No worries. Figured it was worth a shot.

@the_goat : last winter we moved into a property with many many iris. This spring there were some blooms, but lots of plants w/ no blooms. I suspect they have not been divided in many years as the property was vacant for a while & the previous resident was elderly & in poor health. Also, I am pretty certain that they were mowed last year before we bought the place. We need to dig them all up & divide. Would you be interested in them? There were many colors, but I won't know which ones when I dig them. Also: is summer a bad time to dig them up?

To the part about wanting the Irises, most certainly. To the part about summer being a bad time...I honestly have no idea.