[Arid_gardener] Question from Home-Hort WWW page

[jbogle at meritphoenix.com]

85226
jbogle at meritphoenix.com

In November 2007 we planted several 5 gal. ruellia brittonia and Rio Bravo Texas Sage bushes.  They have a Western exposure and that's why we wanted heat and drought tolerant plants.  We have been watering them (drip system) 3 times a week for 30 min. each time.  Everyday I look at the Ruellia Brittonia the leaves are turning yellow and I have to remove them.  At first it was just a few but now it's more and more and more.
My question is:  am I watering too much now that the summer is here or am I not watering enough?  I would appreciate any information.  Thanks very much.
Jeanne Bogle