cjs111, I'd also put the Foxtail under the drip lines. The Phoenix roebelenii can go under the shrub line, in my opinion they look best in morning sun and afternoon shade in AZ.

And remember with Syagrus romanzoffianum, the reason most look like crap in the Valley is not only as a result of your summers and under watering, but also lack of fertilization. With a Queen fertilize, fertilize, fertilize in fall and spring. Once a month in those two season will give your Syagrus a fighting chance at remaining green and healthy.

Lee