Those red leaves appear to be a new 'second flush' of leaves which means the tree is healthy.

If the diameter has increased by 1", the tree has been growing, or you wouldn't have seen any progress.

This is only the second growing season in the ground and for a tree that size, It may take another year or two for it to really 'take off' and start growing. Trees work on making roots for up to several years after they are planted. Sometimes the larger the tree, the longer it takes to get established.

planted in fall 2015 as a 3" caliper transplant.......the tree has not grown at all since planting, but has put on maybe 1" trunk diameter.

==>>> this tree was field grown ... meaning it was dug out of a field ...

it is said.. a tree is 2 or 3 times larger underground.. than what you see above ...

so imagine the amount of roots that were cut off it.. to move it to your yard ...

so when you say that it has not grown at all .. you are leaving out all the work it is doing underground.. replacing the root mass that was lost .. eh ...

also ... if its diameter has increased an inch ... since planting.. then obviously it is growing.. and rather vigorously ...

in tree time.. this thing is thriving ... its only problem.. is that you have some level of instant gratification .... but if you back away from that a bit.. you should now see ... that its doing splendidly ...

no clue where you are ... but it should .. once it replaces the lost root mass .. start growing around 3 feet per year .. at least.. they do for me ... but the key is.. when it starts growing to specs ... that is when you can presume it has replaced the lost root mass ... what we would call... FULLY ESTABLISHED ....

and i suspect that will be next year ....

and when it gets to that point.. it should be rather free range if you are still watering it ...

after all that.. the next maturation point.. will be when it achieves sexual maturation.. and starts producing acorns.. which can be at about age 10 or so ... but that would all be complicated by the digging.. root loss .. transplanting..etc ...

after that happens.. all you have is another 100 years of watching it .. and complaining about all the squirrels you have hanging around on your property.. or deer.. because of the acorns.. lol ..

ken

The red is definitely new growth, not autumn coloration.