I checked with NARI Dallas to see if they could refer anyone. They sent me a list of Dallas area landscapers.
Here is a partial list:
(I have excluded Plano, Wylie, and Garland)
Mike Dickerson
Landscape Concepts
4823 Dozier Road
Carrollton, TX 75010
972-939-1492
landscapeconcepts@email.msn.com
Richard Amoedo
Stonebriar Landscape Services
14004 Stemmons Frwy.
Dallas, TX 75234
972-306-4462
www.bestlandscapes.com
bestland@swbell.net
Andrew Haynes
Metroplex Garden Design Landscaping
2607 Walnut Hill Lane
Dallas, TX 75229
214-350-0831
www.gardendesignlandscaping.com
akhaynes1@aol.com
Larry Brinkley
BLT Landscape Services
2143 Joe Field Rd., #100
Dallas, TX 75229
214-351-2196
www.bltlandscapeservices.com
bltlandscapeservices@airmail.net
Chris Strempek
Complete Landsculpture
2171 Shorecrest Dr.
Dallas, TX 75235
214-358-5296
www.completelandsculpture.com
chriss@completelandsculpture.com
I see you live in Fort Worth, so you might try the NARI in Fort Worth. They may not have any listed on the site, so use the contact option to ask them who they could refer.
http://www.narifw.org/
Also, check out the post by kmao in this same forum.