Siberian Iris will naturalize and over time create large drifts of color. 

Why you should be growing Siberian Iris.

Siberian iris are valuable for the earliness of their bloom, their vigor and longevity. Once established you can count on Siberian iris to grow increase and bloom for years if not decades to come.

 Here in Vermont Siberian iris are one of the most prolific and rugged iris that I grow. And I can count on them blooming profusely every year as they have done for decades.

 Siberian iris will grow into large stands which are very weed resistant and when in bloom produce a stunning show.

They are very adaptable and will tolerate wet conditions very well and a certain degree of dry conditions as well.

While most people think of Siberian iris as coming in purples blues and whites there are actually a number of other colors and number of subtle hues and variation in those blues purples and whites that can make the flowers very interesting. Additionally there are some unusual Siberian iris flowers with ruffles and frills.

 Siberian iris foliage are is typically nice blue green shade and in my opinion a large stand has a very wonderful and strong visual effect.  Also typically Siberian iris with purple or blue flowers have pigmented buds which add to the interest of the plant and and then of course the bloom season.

I have Siberian iris growing all over my property in many different locations both dry and wet and strikingly I have a large number of plants that have   seeded in.

This is basic Iris terminology that is used to describe the various flower parts.

Siberian Iris have fine fibrous roots, because of that they are sensitive to drying out. And so one must be sure to keep the roots moist.

 I feel confident in stating that Siberian iris are strong growing and adaptive plants. There are a few aspects of Siberian iris cultivation and propagation that must be considered, the most significant in my mind is the root system is fine and fibrous and as such they are is sensitive to drying out therefore one must take care to keep the roots moist when dividing and transplanting and even a short period of time in the sun is very detrimental. A damp cloth or piece of burlap over the roots is helpful when transplanting.

Siberian Iris foliage has a great landscape value in itself. The blue-green foliage is almost always impeccable.

The other slight drawback of Siberian iris is that they take a little bit longer to recover after dividing or transplanting. I typically describe Siberian iris as sulkers and so the first year they just kind of sit there and act unhappy.

I think this old adage gardening adage applies 
"the first year they sleep, the second year they creep, and the third year they leap"

However once they get established and begin to increase the clumps will just get larger and larger and produce more and more blooms.

The variation in even the blue and purple shades can make for some spectacular combinations and years ago we had large drifts of purple blue and white iris that were just stunning currently we have a smaller size patches but a much larger variety. Some of the newer varieties that we have are quite striking are quite exceptional. There is for instance a yellow Siberian iris that has very spectacular ruffles and the yellow fades to a pale yellow. Other colors include pink shades and pale lavender.

Siberian Iris exhibit a nice variation in blues, purples and white as well as pink and lavender shades as well as yellow.

There is also some interesting variation in flower size with some of the smaller flowered Siberian iris having a wonderful delicate almost butterfly like appearance. Siberian iris like a good rich soil and a fair amount of moisture under the circumstances you can expect good strong growth and a lot of bloom.

Siberian Iris can naturalize and coexist with other plants quite well.

That being said as I mentioned I have Siberian iris growing all over my property in sandy, clay, wet, dry add a lot of marginal growing areas. And all the iris in these various locations grow and bloom amazingly well.

So the most important aspect of growing and cultivating Siberian iris is to be sure to care for them while they are getting established. This means making sure that the roots stay moist before you plant them and then keep them well watered while they are getting established. Of course there is a balance and I expect that you could water even Siberian iris too much.

One last thing to keep in mind in my experience, here in Vermont one must take care too when dividing Siberian iris to have the divisions relatively large, this ensures or at the very least increases the chance that the divided clumps will reestablish and grow. Tiny divisions of Siberian iris frequently fail and are not likely to survive a winter if divided and transplanted in the season late season.