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Unfortunately, your photo did not come through. I don't think that it would matter much, though, since pinning down an exact ID will be very close to impossible with Iris flowers.

Regardless, most Iris have very similar care.

Here are some articles that will help: https://www.gardeningknowhow.com/category/ornamental/bulbs/iris

This should be done in early Autumn. The process will be easy, as long as you stay on top of keeping the seeds from getting infected.

Seeds must be soaked for about 5 days prior to prepping them for cold stratification. Change the water each day until the end of the 5 day period.

After, dry them off well and place into your seed starting soil. Place them outside out of direct sunlight for the duration of winter (since you are in a zone that is very close to the limit of the cold that they can stand, I would do this treatment and plant them about 2 months before Spring). They will need the cold to break dormancy. After about 2 months of keeping the soil moist, but not wet or dry, you will notice the first signs of life.

Here is an article to help you with their care after that:

https://www.gardeningknowhow.com/ornamental/bulbs/iris/growing-flag-iris-plants.htm

We don't recommend watering plants with it. That smelly water is due to sulfur reducing bacteria. This is VERY acidic and should not be used for other plants. This should be taken as a sign that your container needs more drainage, and your plants' roots may be rotting.

They probably won't bloom this year, but you can go ahead and plant them.

https://www.gardeningknowhow.com/ornamental/bulbs/iris/iris-plant-care.htm

Irises don't dependably bloom every year. The more prolific ones do, because they have a bigger stand of rhizomes. Iris need a sunny location and they like the top of their rhizomes just above the soil line to bask in the sun. Also, if left for years, they will get overcrowded and that will inhibit blooming. So will shade. Also, keep weeds and ground covers from creeping over them. About every 3 or 4 years, dig up your clumps and break off the sideshoots coming off the mother rhizome. Replant the offshoots and discard the mother rhizome. It won't bloom again.

Here is more info:
https://www.gardeningknowhow.com/ornamental/bulbs/iris/iris-plant-care.htm

https://www.gardeningknowhow.com/ornamental/bulbs/iris/divide-bearded-irises.htm

https://www.gardeningknowhow.com/ornamental/bulbs/iris/iris-plants-not-flowering.htm

If you can get the rhizomes out of the ground, go ahead and trim the leaves and let the rhizomes dry. Store them in a cool dark environment and replant them when dormant in late summer. Here's an article that may be helpful:

https://www.gardeningknowhow.com/ornamental/bulbs/iris/storing-iris-rhizomes.htm

https://www.gardeningknowhow.com/plant-problems/environmental/flood-damage-garden.htm