like bamboo/grass, easy to pull, grows 2ft tall or so. Just mowed it
down, but was wondering if I could kill the weed seeds by covering it
now w/ black plastic until next May.

I have heard that covering soil with plastic isn't a good idea. It has
something to do with the air not being able to get into the soil, as well as
problems with the water getting in. Apparently it can make the soil sterile
or at least not the best for growing things well. I think mulches of almost
ant sort are a much better solution.

Jen