Some of those little weeds you mention are good nitrogen fixers. Just because they don't match the idea that Scott's and other Weed and Feed manufacturer's promote for the perfect turf, doesn't mean they have no merit.

I poked some Swiss chard in along the wall last fall, and despite the extreme cold, several survived and with the spring foundation watering it is almost ready for the first harvest of a few leaves for dinner. Mmmmm!

SRS