My thinking is to establish and work with as many native grasses and nitrogen fixers as possible. There are a lot of possible candidates. Seed may be more expensive but the plants will do well. Just be aware of any possible toxicity issues with your long term goals. Some lupine sand horses for example. I’m not a big fan of Bermuda either. It’s good for horses and other animals but has a huge down side. You will eventually find in your raised beds. It’s good to think long term, for yourself and your progeny.
I’m also in the San Diego E county and have been interested in these things for a while. Contact me if you want to strategize/ co miserate/ or connect. 760 855-5365
