dogwood

This is the yamadori tree that I buy in the fall. I recently noticed yellow spots between the veins on some old leaves (first spring leaves). The tip of these leaves is also a bit dry. What could be the most likely? Underwatering, overwatering, pH problems or disease? In the spring there was a...

I recently got a dogwood (not sure the species) for free from a local nursery. There is some weird growth towards the bottom of the trunk. It kind of looks like a BUNCH of buds in one location. Do any of yall know what it is? Would it be okay to cut it off as it creates some reverse taper? Thanks!

So a little back story here. October I was started to get the Bonsai "hype". I found this naturally air layered dogwood branch at one of the commercial places I do work for. It came up well enough with a lot of good roots. Plus it has some interesting scars and shape IMHO. Next I found some...