Succulents also hardly need any water and don't get "bitten" by the sun on those 40'C days. They grow fast too but aren't weedy (as in they don't take over a garden). They also often throw up the most beautiful flowers about once a year. Little old ladies often have succulents growing in their gardens and might be happy to give you some cuttings for free. I have photos in my FB album of my garden... can't recall if I've added you or not... you're welcome to check it out.