Thank you for all your nice comments.
Gene - my dog may protest 133 trees. She would definitely have to hurdle a few to get to the yard : )
Nichole - it is probably a combination of the heat and sun here in Houston, plus when I up potted to the 3 gallon nursery pot, 1 Tbsp of 10-10-10 fertilizer, 2 Tbsp of pellitized dolomitic limestone and 2 Tbsp of earthworm castings were added to the potting mix. I know, it is very little added especially when you consider those additions were added to potting soil for two 3 gallon nursery pots. It is always easier to add more later than kick yourself later from killing a tree with too much lime or fertilizer. Having said that, I also fertilize once per week with Vigoro 10-10-10 All Purpose Plant Food (liquid) per label directions (1/2 capful per 2 gallons water). My potting mix was 4/6/3 parts by volume of sifted coarse perlite / black humus / coir.