My little Himezakura seems to be suffering from some chlorosis of the leaves. It's been growing well, new leaves keep coming out. A few tiny new white roots appearing. I stopped using nitrogen fertilizers and only giving it worm tea. All my other little plants with the worm tea treatment are doing fine - but this one grows a new leaf, drops a leaf, grows another, drops another.
The picture may not do it justice, but the leaves are a light green color. Looking closely you can almost see the veins. No bugs. Not overwatered - if anything, perhaps not enough water - I wait til the skewer is just slightly cool. It's also not drying out real fast because it's been cold here. It's on a west windowsill with sheers. Water ph 7.6 To give you some perspective of size, it stands about 10-11" tall from the base of the 3" pot to the top leaf.
I'm at a loss. I don't know what else to do. It needs something - I just don't know what.

I welcome your comments.