Ask Mr. Smarty Plants

We are sorry, but we are no longer able to accept pictures.  You can go to our Plant Identification page which has links to several websites that do accept pictures; you may be able to get more information from that.

However, since Sophora secundiflora (Texas mountain laurel) is a plant that is native to the area of Llano County, according to this USDA Plant Profile Map, we can assume that the  soils where you have planted the tree are hospitable to it. And since it is four or five years old, we can be fairly confident that you planted it with provisions for good drainage. If you follow this plant link, Sophora secundiflora (Texas mountain laurel), to our webpage, you can study the Growing Conditions and Propagation Instructions to make sure everything is as it should be, although it sounds as though you are giving it good care.

So, we have to go looking for some pest or disease that may be causing your problems. Most of the references we found assured us the Mountain Laurel was subject to few problems; don't you hate when they say that and you KNOW there is something? One site, Texas A&M Integrated Pest Management,  has an article Genista Caterpillar on Texas Mountain Laurel, which includes suggestions on management.

In a previous Mr. Smarty Plants answer on Mountain Laurel, we discussed the possibility of chlorosis, or loss of chlorophyll, in the leaves of the same plant.  Please follow that link and note that we recommended the addition of an iron supplement to the soil because of the difficulty a plant can experience in extracting nitrogen from an alkaline soil. Also, consider our suggestion for adding a shredded bark mulch over the roots of the tree, which will both protect the roots from heat and cold but, as it decomposes, amend the drainage in the soil.