Alright, so I am a little confused and need some guidance. I have a shohin Chochubai and saw some leaves turn to yellow ( which I heard is normal) but then I see some leaves with light green foliage with red edges and the other leaves are dark green. Should I be worried? Maybe overwatering or sunburn?
Chlorosis is a yellowing of leaf tissue due to a lack of chlorophyll. Possible causes of chlorosis include poor drainage, damaged roots, compacted roots, high alkalinity, and nutrient deficiencies in the plant .
The red edges on the leaves is normal for some Chochubai!
I would explore the other factors noted above!
A little more fertilizer with readily available nitrogen and maybe chelated iron would be good to try.