I've done a little in Tuscon. Just a reminder, this is not a forum to advertise your business.
If you wish to list your business at The Helpful Gardener, just go to our main page (click the logo in the top left hand corner) and click on the link to our contact page. We'll be glad to exchange links with you and list your Landscaping Website in our Landscaping section.
I really liked the plant selection at Tohono Chul in Tuscon; lots of Sonoran plants. I like 'scaping with natives...