Hope it went well.

That could work. I'll share my thought/experience in case it could be of some use to you or anyone else who visits this forum. One option would be to sow seeds in a small raised bed over the winter and then transplant the seedlings as they come up in the spring into the plug trays or directly where you want them to grow. Personally I like to start seeds in a flat or directly in the garden and then move the seedlings to pots as I get more uniform results that way. When starting the seeds in plugs you can end up with a lot of empty cells if the germination rate is low. With flats you can sow hundreds of seeds and only keep the ones you need. I have had a few species where only 1-5% were viable, so if they had been started in cells or pots it would have been a bust. Most grasses can be kept dry in the fridge until ready to plant out in the spring or early summer. For some species germination rates may be a little higher if given cold stratification and some like sweet grass require it. Wrapping them up and putting them in the shed might be problematic if the seeds start germinating early. I start a lot of native seeds indoors in pots for planting out in the spring. I do the stratification on moistened paper towel placed in little clear plastic bags and put those in the crisper. After 60 days or so I check them occasionally for germination. If the seed is really small it can be difficult to get them off the paper towel but it can be done with a spray bottle onto a white plate (so you can see them). This year I had seeds stratifying through late spring and planted some out directly. Some of the species that prefer full sun perform best if sown directly into the garden.

Hibiscus moscheutos is native to eastern North America as far north as NY and NH.

Here's a link to The Winfield Collection, they might have a pattern you like. I did a google search and lots of sites came up--maybe you could look at one of them and figure out a way to do it. Here's one of them. http://www.christmasnightinc.com/c108/Economy-Outdoor-Nativity-Stable-53H-p281.html Good luck with your project and be sure to come back and share pics with us when you finish, okay? Luvs Here is a link that might be useful: Winfield Collection patterns