I think with all the combative language, we have missed an important part of this site: there are TREES there. So the effects of solarization will be substantially reduced. Solarization is mostly used to control soil diseases and nematodes that run rampant in parts of California, studies have shown it only effects about 2" of the soil in terms of sterlization of dormant seeds - it is not really what you need. Just scrape off whatever you can, get some black filter cloth - it blocks light but not water - and put it down, then starting building up some bew compost with whatever you can get your hands on - layer it onto the black cloth and try to get it about 12" deep. You can cut the cloth open in some areas to put in a larger addition, but be sure to remove the soil from the hole and dispose of it rather than mixing it into the compost. Your area will not be hot enough long enough to use solarization for weed removal and the lack of a heat containment below soil during solarization makes its efficiency just terrible related to the work and time required to do it.

Firstly, what is your deer situation? Deer have eliminated a lot of our native plants and are going to destroy almost everything you plant unless you stick to a few things they hate - and that doesn't always prevent deer damage. The ecology here has changed drastically since deer have moved in and a lot of our choicest natives have been grazed out of existence. If you are not going to protect against deer, you are fighting a losing battle. I found that out the hard way when I tried to plant our native wild azalea - it never had a chance.

Not trying to get into the wintersow vs. not wintersow debate here but....... The only time it makes sense to wintersow is when you are sowing seeds needing cold stratification and I know some of the ones you listed do not need it. I sowed the Asceplsis incarnata in early August and plan to put them in the ground under mulch all winter. I am winter sowing some native shrub seeds needing a couple months of cold strat. in pots outdoors and three others that are perennials that specifically need it. There are no hard fast rules to this. To each his own. I rather enjoy sowing indoors in winter and have had very good results and it gives me an uplift in winter to do that. I have had good head starts on healthy plants this way and have sowed many SW shrubs, perennials, ornamental grasses, cactus, etc. I always have something indoors in winter I am sowing. I usually start them in October or November in a large sunny S. exposure window and grow them very cool in the coldest dark months sort of in a wait pattern, then let them get warm again in late Feb when the sun comes stronger. I use lights sometimes if necessary but usually they just sit there in the cold. I am not a wintersower to the degree popularized to a hobby level of lots of containers with holes, lids etc craze with every seed I get being done that way. I just use regular pots in the shade under the carport for the seeds specifically needing a cold period. For penstemons its good, they come up when its still very cold. Some seeds needing cold I direct sow. Sometimes I experiment and try all different ways to see what does best with a backup supply to resow in spring. Look up your different varieties and see what they need and go from there. I have sowed seeds as early as October and had established plugs to put into the ground come spring. Other times I put the late summer sown seedlings in the ground in late fall and cover them with leaf mulch and had good well rooted starts that way in spring. Look at nature, she does that all the time with seeds that have fallen. Mostly, make it fun for yourself and do what you want. Save extra seeds for insurance, or try multiple ways and experiment. Do a test in a damp paper towel with a few seeds to see if they sprout in a few days. Often that will tell you want you need to know.

Thanks TG Thats just what I wanted to know, I wonder when the best time would be to plant the annuals here, as we have this big problem "No Rain even in the Wet Season". I will see if one of my GW friends on the NSW/VIC border would like the other ones, I dont think there would be much humidity there near the Murray River. Appricate your help.......MM.