SECRET Fertilizer :) My 'fertilizing cocktail' consists of mixing 1/2 bottle of cheap beer, 1 tablespoon of Epson salts, and 2 tablespoons of fish emulsion in a watering can (1-2 gallons). I do this to ALL my vegetable, flowers, and indoor plants. You will definitely notice the difference in a few weeks! Don't waste too much money on the beer. Cheapest still works great -- plants aren't picky!
Drip irrigation- A pinner wrote: I do this every year and it works great! Especially during a long Texas drought- less water waste. The only thing that kept my plants going, and once the plants get growing they hide the bottles. Quick and easy way to fertilize too! Should work well in Arizona too!