"It is now reported as invading native coastal dunes in northern California. Due to its extensive occurrence in lawns and gardens, O. pes-caprae has the potential to rapidly spread via the production of bulblets and contaminated soils into adjacent natural areas in California and elsewhere." What more of a reason do you need not to encourage it?

My soil and light are different from yours but I used to play games with the bermuda and St Aug that invaded my stone driveway. One year I would not water and watch the bermuda take over. Then next year I would water once a week and mow it high and watch the St Aug take over. I did that for about 10 years playing them back and forth. Now I'm doing that with some zoysia and bermuda. Infrequent watering and mowing high has kept all the grassy weeds out of the sunniest parts of my lawn for years. I have had the occasional bermuda, nutgrass, and wildflowers (that thing everyone calls wild onion) but they have all gone away. Weeds I cannot control with water and mowing are broadleafed weeds like henbit, oxalis and chickweed. Where do you live?

That was something else I have tried, as I looked again at the bottle of concentrates I have, one of Fertilome's products has triclopyr and another had dicamba along with the 2,4-d. As I am watching the backyard these past few days, it is all yellowing and the bindweed is slowly withering. This was the area that I hit with a concentrate of 2,4-d and metsulfuron methyl. I was told it may take time but would work. Our biggest problem in central and western Kansas is that the field bindweed has become resistant to glyphosate and 2,4-d. I guess just had to continue on it, but now it is trying to poke in where some has established, hopefully the bermuda will keep it down, plus I spot treat whenever I see them. Today I did spread Tall Fescue underneath my tree along with some bermuda though it likes sun better, but I have more of it than others. Prior to doing that I had spread phosphorous in the area I tore up, worked the soil with my weasel and gave it some water, then today sowed the seeds, and applied scotts liquid turf grower. This particular area I had already gotten the weeds to die off, and it was loaded with earthworms. It was tough to level out due to the steep grade between my house and my neighbor, we'll see how it turns out since it is a shady area.

zymurgist First allow me to say it is way too late to be planting any warm season grass seed right now unless you live Down Under. Late Spring is the time to do this. Sod you can lay anytime of year, but again Spring is best. Now on to your questions: are those zoysia varieties that you listed in order of shade tolerance? Yes Are there seeded varieties that can handle some shade and are drought tolerant? Yes as a general rule for Zoysia they are drought tolerant and tolerate some light shade. However the seeded varieties will not perform in terms of shade tolerance as well as the ones I listed earlier. You have got all of Fall, Winter, and most of next Spring to do some home work. So use the time to make an educated decision based on your local conditions. For the warm season grasses Saint Augustine is king in terms of shade tolerance followed by Zoysia then Bermuda. However you will not find any SA seed, and if you do inform me I will make both of us very rich.