Thank you for doing some reading. You don't really need a diagnosis before using corn meal. It doubles as an organic fertilizer as well as eradicating most lawn diseases. Since it stopped raining for a week I put some down today. So your lawn service treated for grubs multiple times already? I think I know the answer to this but did they look for grubs before treating? They're easy to find. You dig up a square foot of turf and if you find fewer than a dozen grubs, you cover it back up and leave everything alone. If you find a slimy, uncountable mess of grubs, then you can take action. But you might wait another couple weeks to go looking for them. This time of year they would still be eggs. Then you would expect to see damaged turf in August or September, not May and June. You may need to adjust your sprinklers, too. If you are watering more frequently than once every 5 days (in 100 degree heat), then that is too frequently. Grass should be watered deeply and infrequently. I have yet to water my lawn either in San Antonio or in the Hill Country. Deeply means 1 inch all at one time. Infrequently means once per week with temps in the 90s, once every 2 weeks with temps in the 80s, once every 3 weeks with temps in the 70s, and once a month the rest of the cooler part of the year. With temps in the 100s you should be able to go once every 5 days. When you allow the soil surface to completely dry out you avoid disease and weeds in St Augustine. Lawn care is as simple as watering (described above), mulch mowing at the highest setting (always for St Augustine), and fertilizing 3x per year. If you are doing those three things you should not need any other treatments like insecticide, herbicide, fungicide, dethatching, core aerating, top dressing, or composting. Once you eliminate the need for the counter measures, it's dead simple.

Azalea and rhododendron leaves naturally turn yellow before they fall. Some of that appears in the photos. There are also leaf spots that are caused by a variety of fungal infections. These are an aesthetic issue, not a threat to the plant's survival. Other than that, the photos are not clear enough to see anything else.

Either soil wouldn't be suitable for succulents, but 1st one at least wasn't dense. Can you get some perlite and grit? Or pumice, scoria, lava rock, turface? Few of these would make good mix forsucculents. Same is discussed in this thread: http://forums.gardenweb.com/discussions/4025867/is-this-soil-good-for-succulents?n=21 see post by Crenda toward end of it showing good photos of gritty mix, or mix of soil+perlite. In your weather, gritty would be much better for succulents (and plastic pots could be used). You said plants were outside for 9 days - I would think that they were not acclimatized to the sun; it should be done gradually putting them into more and more sun every few days.

Thanks, I thought so but needed someone else's opinion, since it is so sandy and dry there