My meiwa continues to decline. Now I realize this exact process happened to my nagami kumquat months ago. Except that the nagami was on own root and I chalked it up to root rot without really looking at it and tossed it.
There must be some sort of fungal or bacterial pathogen that only affects the grafted kumquat scion because the the rootstock (citrumelo) and interstock (poncirus) are unaffected.
I found this post on the Houzz forum which describes the same process. Hmmm
As a last resort, I put the meiwa in my greenhouse where it recieves full sun, day temps already get into the 90s.
Does anyone know how often I should water now that it's in the greenhouse? It's in 5-1-1. I will check it tomorrow for moisture, but since it has no leaves I don't want to drown the rootstock.
https://www.houzz.com/discussions/4704398/branch-dieback-on-my-other-kumquat