Ask Mr. Smarty Plants

We can definitely sympathize with you on grass installation; it can be very hard work, and a lot of maintenance. We are going to suggest that you forget the lawn and convert your space to a xeriscape. As we mentioned, lawns can be labor and maintenance intensive, costing a lot of money for water and fertilizer just to keep them alive.

First, let's deal with those weeds, which are no doubt going to contest mightily for the space with your grass or whatever you plant. From About.com Landscaping, here is an article on Solarization: An Easy Method for Killing Weeds. Although this sounds like a lot or work, we assume you are not dealing with dead trees or large shrubs, just a weedy space. This is a fairly complex solution, needs to be done in the summer when it's hot enough to fry the weeds and the roots, and isn't attractive while it's underway. But you will then be able to start with a clean slate, more or less.

From Bob Beyer, Travis County Master Gardener, here is an article on Dry Climate Landscaping.

We realize that all of our suggestions sound like a lot of work and expense, but they are all things you can do gradually, replacing the (hopefully dead) weeds with decomposed granite, and small beds of succulents or other plants that do well in our climate. The point is that grass of any kind is going to be difficult to plant, difficult to pay for the water to maintain it and difficult to keep alive in Austin.