First off, if they bloomed this spring and then again now... more than likely they are rebloomers. Since you have divided them they are happy and have decided to put on a show for you.

As for the seeds, the seeds that are on the iris now will not be true to the plant. Who knows what they will look like.They might be a completely different color or shape or size... To get more of this exact iris, you must dig and divide again.. but be sure to wait about 3 or 4 yrs since the last dig..

What color is is it??

They are white. I know the seeds will not be true to the plant, but I definitely want to save them and try to see if I can get any to grow from the seeds. My father died while these were blooming.. so these seeds are sentimental to me. I've read that the pods need to ripen while on the stem... so am wondering if the freeze will harm them?

I don't know that much about trying to grow them from seeds. I am just not that patient of a person. Give me a shovel and let me dig and divide, It can take up to 3 years and many time in the bee pods there is nothing in them.. Not sure about the freeze harming them, usually they are allowed to dry on the stem and then taken in, they do have to go thru a cold spell and then are lined out sometime or another.. but that is for the spring pods. Like I said as many as I grow that is one area I have not yet ventured into...Are you on Facebook? there is an amazing group there that would be really helpful with these questions.

littlebit

I have good luck with onion and shallot seeds by cutting the blooms and bringing them inside to ripen in a vase of water when it gets too cold outside for them to continue. I don't know if your iris pods were ruined by the frost, or if this would work in your case, but you could try that and see if it works. I have read that iris seed needs to be planted right away like littlebit was saying.

Here's an old post about seed treatment from Walter Moores, a hybridizer in Mississippi.

1. Leave seed pod on stalk in sun to dry and partially split open . . .another month or two depending on where you live.

2. Harvest pod and shell seeds into paper cup indoors.

3. Let dry, stirring occasionally.

4. Place seed in pill bottle.

5. Place in freezer.

6. In late October or early November, depending on where you live, plant seeds in a pot with a mixture of about 2/3 potting soil and the rest your own garden soil.

7. Sink pot into the ground with its edge about 1/2 inch exposed. Water during dry spells.

8. Germination comes in early spring.

9. Line out seedlings in mid to late May (later in colder climates).

10. Two years from seed, you'll enjoy bloom in most cases.

Several Dykes Medal winners have come from unknown pods, STEPPING OUT, DUSKY CHALLENGER, and DEBBY RAIRDON to name a few.

Thanks! I copied that out and will follow the instructions once my pods are ready.