Since last year, I learned the hard way that poppies don't like to be moved. So unless you're really good at getting your hunks of seedlings out of the WS containers and then into the ground undisturbed, you've got a problem.
Some people had brought up the idea of using the expanding peat 'thingies' (need to stay technical), but were discouraged due to the fact that they were likely to dry out too quickly. Then others reported that their newspaper pot experiments didn't seem to work as well as hoped.
I have two ideas, and need to know their chances for success. The first is still using the expandable peat pellet things. Would it work to fully soak them, and then scrunch them tightly together in a milk carton? My hope would be that this would help with water retention, yet still allow them to be separated without disturbing the roots. My second idea is similar, but would use the peat pots that you fill with soil. These could also be soaked until they are softened, and then scrunched together in the WS container. Would they melt together, or would they come out easily at transplant time? Or...could either of these methods be used if they were nestled down into soil, peat moss, etc?
One last thing...as I search for appropriate WS containers, I was wondering if 'Press and Seal' plastic wrap would hold tight enough over the top of a container for WS? Would snow collapse it? Would the wind rip it off?