I bought this 3 gallon tree at the Houston Arboretum fall sale in October 2019. Planted it on October 26th. It was not the best looking tree I'd ever seen, but hoped it would look better as (if) it grows. The first picture below is from early July 2021, the second picture is from from early July 2020 - not doing very well at all. No picture was taken in 2022 as this tree was close to dead, and in 2023 completely dead.
The picture below is from late October 2019.
In early March 2020, the Two-Wing Silverbell leafed out and even had a few white flowers. The picture on the right is from early April 2020 - the flowers were gone and the leaves looked healthy but sparse.
By mid July 2020, this seedling is doing very badly. The leaves have turned a dull greenish brown and most of them have fallen off.