OK, since you seem to be the 'resident plant expert', I have a question.  What do you know about a weed/whatever called "Sweet Annie"?  A woman at work gave me a tiny little plant of it about 5 years ago, and it grew into a 5 ft tall thing---smells VERY nice, and has about a billion seeds on it every fall---so these seeds have spread out all over my yard, and little starts of it are popping up everywhere....which I really dont mind, because when I mow, I mow a lot of it down and it always smells really good.  I do the same with some of my spearmint---I let it grow places that I really dont care for it to be, just so it smells nice when I weed-whack it down.   I have seen wreaths made from dried Sweet Annie at craft shows, and it continues to smell good, even dried. Are there any other uses for it?

Thanks for all the info.  It's just now starting to grow all the bushy leaves, so there wont be any seeds for awhile, but you're more than welcome to as many as you want---it's sort of an invasive thing, but it's a pretty plant, and I DO like the scent.