Jane doesn't give herself enough credit in her struggle to control weeds. Where you live, think of your worst weed nightmare (or at least one of them) - thats cress/bittercress (Cardiname oligosperma) in the Pacific Northwest; a plant of small stature, but with a daunting proclivity to reproduce itself. When ripe, its seed capsules explode, scattering seeds up to several yards away from the mother plant. It has been reported that each bittercress plant is capable of producing over 5000 seed, most of which can germinate within 2 weeks after being dispersed. They come up everywhere, I mean EVERYWHERE in great numbers. They prefer cool, moist conditions in sun; shade or heat may slow them down, but neither stops them. I don't know what does, except desert conditions or constant (read endless), enduring, consummate weeding. Here, if the cress is pulled and left on the soil surface it will usually reroot overnight, unless it is hot, sunny, and windy. Good luck, Jane. I feel for you and everyone that has to deal with this little devil, or your own devil weed. Mike Rummerfield Onalaska, Washington USA