starting a meadow from plugs
It looks like a few people are not hibernating and can maybe answer a question I have about planting a meadow in the spring. The area is about 20'x25'. The area was lawn grass and weeds last year and I have covered it with thick newspaper, cardboard, and leaf layers last year. I expect to have many meadow/prairie plants in the spring using the winter sowing method. These will be first year seedlings.
My idea is to first uncover the soil in the spring and wait for any weed seeds to sprout, apply roundup, and repeat just to be sure. Since I will have (I've heard) a lot of seedlings using the WSM, I am wondering if I should/can plant the plugs of seedlings densely for the first year in order to prevent new weeds from blowing in and sprouting. Sort of a meadow nursery. When the plants get bigger, I can remove some of them for transplanting or trading. Or thin them out if necessary.
Also, the meadow will include grasses and forbs of various heights. Because it is in my front yard and smallish, I am thinking that it would be better to cluster the plant varieties rather than create more of an open grassland. There are some gardens nearby that are very dense and clustered and look pretty good, but I don't know if that was intentional or not.
Does this sound like a reasonable plan?
Any suggestions for plant spacing and clustering?