magnolia stellata

Magnolia Stellata end of summer 2023

My magnolia has some leaves that are yellow. I'm not sure if it's to much sun, not enough water or wrong amounts of fertilizer? Tree was repotted this year and is less vigorous than last year, which is to be expected, but I'm not sure what else might be wrong. Tree gets full sun, I'm watering...

I've had this Star Magnolia for a little over a year and I was initially drawn to its twin trunks. My plan was to eventually shorten the left trunk and make the right more dominant. But this morning I looked out the window at it and was struck by the idea of converting it instead to a single...