Q: I have an area about 15 feet by 12 feet that is bordered on two sides by sidewalk on the south side of my house. I have an 8-year-old thornless mesquite tree planted in this area.Β I am worried about the possibility of the roots damaging the sidewalks. Should I remove this tree? If I do, what type of tree would you recommend for that size area that would not harm the sidewalks? This area is next to my front patio and I would like to have some shade for it.
A:Β Thornless mesquite trees are a South American hybrid also known as the Chilean mesquite. The mature size of this tree is approximately 30 feet by 30 feet and that is only the above-ground size. The roots may spread twice as far, so your sidewalk is in jeopardy.
Small trees that could fit this space include kidneywood, Texas mountain laurel, Arizona rosewood, little leaf ash, and leather-leaf acacia. These may not give the shade you desire.
A few slightly larger trees that might fit are Texas ebony, palo blanco, and cascalote. I am sure there are others, so it would be good to visit our local nurseries to see what they have available.
Peter L. Warren is the Forest Health Program Coordinator for the Arizona Department of Forestry and Fire Management. Questions, photos and videos may be emailed toΒ tucsongardensage@gmail.com
