HYB: more experiments...& question

Starting to feel like I'm talking to myself here (again), but some of you have said you enjoy my ramblings, so here's the latest idea:
If surviving very early spring/very late fall blooming seedlings are the 'norm' from "summer" rebloomers, I can't normally use them for further breeding because they will nearly always be frozen out here.
Now that I know I can keep many climate sensitive store bought cultivars growing well enough in pots to at least give me one bloom season's worth of viable pollen, maybe I can set pods on some of these very early/very late rebloom seedlings if I grow them in pots.
Have any of you successfully set pods on potted irises? Did they mature normally and produce viable seeds?
The one time I tried this was in the fall (December, I think) and while it did set a pod, the pod didn't mature normally, and the few seeds it contained didn't germinate.
Some of my seedlings don't like pot culture, but some seem to be thriving, a few that I didn't get around to planting back in the ground year before last are putting up bloomstalks.
If this approach will work, I will probably put together some kind of unheated semi-permanent plastic or Reemay covered outbuilding to grow the extra-early bloomers in. 

Not enough room in the house, plus it's too much work dragging pots around.

Light frost last night that didn't last long, but tonight may be worse.
--
Linda Mann east Tennessee USA zone 7/8
East Tennessee Iris Society <http://www.DiscoverET.org/etis>
Region 7, Kentucky-Tennessee <http://www.aisregion7.org>
American Iris Society web site <http://www.irises.org>
talk archives: <http://www.hort.net/lists/iris-talk/>
photos archives: <http://www.hort.net/lists/iris-photos/>
online R&I <http://www.irisregister.com>

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