access the Photo/History page for the Laurel Sumac to see more about this tree
Looking at the photos from last month & this month, you will probably notice a difference in the color of the leaves, which was diagnosed as an iron deficiency, attributable to the pH of the soil being too alkaline (over 7.0) & depriving the plant of the ability to absorb iron present in the potting mix. (the Bouganvillea also suffers from this problem, but more severely)
The Sumac, like many other plants, prefers & needs a slightly acidic (below 7.0) mix in order to absorb iron & other minerals. There are multiple ways to do this, including using a fertilizer that is manufactured specifically for plants that need a slightly-acidic soil mix.
As you can see, the leaves are now "greening-up" & the new leaves are coming out green, not yellow, as before.
Now if someone would teach me how to properly prune this tree to show off it's best features...well, I'll have to work on that.