The odds are the problem will be found to be one of 3 things. A) A combination of a water-retentive soil and over-watering B) A high level of soluble salts in the soil resulting from watering in small sips so most or all of the solubles from fertilizers and tap water accumulate in the soil C) Tight roots

The tree is beginning to get the poodle look, where foliage tends to be concentrated near apices (growing tips of branches), but the burning on leaf margins suggests over-watering or a high salt concentration in the soil.

The logical thing to do would be to repot (as opposed to potting up), making sure you get the plant into a soil that allows you to water properly. Fortunately, you're coming into the best time of the year to perform that chore. Feeling ambitious?

Al

Many thanks, Al.

I can't repot it myself but will be sure it gets done.

In the meantime, is it okay to cut off those few yellowing leaves and if so, should I cut near the "trunk" of the plant or at the juncture of the leaves and "branches"?

LD

If it was late fall or winter, your tree had fewer leaves, or if it was obviously circling the drain, I'd suggest you leave the offending leaves on and let the tree shed them of its own accord after it's salvaged all the mobile nutrients and whatever else it can translocate to other tree parts, but your tree has enough foliage that it will hardly miss them. If you want them removed, just snip through the petiole (leaf stem) anywhere between the leaf and its attachment point. The abscission layer that is already forming where the leaf is attached will soon be complete and the stub will drop off.

Al

Here is a link that might be useful: More about trees in containers if you click me ...

Thanks ever so much, Al!!

LD