CaliFlowers said:Since you've thrown everything at it except the kitchen sink, my guess would be that it's genetic. In Japan and China, Clivia breeders have rigorously selected strains which exhibit various "chlorophyllic abnormalities" and charge premium prices for them. Search on keywords Clivia, Akebono, Light of Buddha, Painted Face for examples.
As far as vigor goes, has it kept pace with its green siblings?
Yeah, like a lot of plants that have chartreuse leaf color. Lots of Hostas, Sedum 'Ogon'. I generally don't much care for the look because it makes them look like sick plants to me. 'Ogon' is nice when it's really healthy, but there's always an exception for me. I do think it probably has a genetic component to the color, but this plant has been greener than it is now. I'm ready to try the kitchen sink on it
. It has grown reasonably well, but my treatment of seedlings doesn't happen all at the same time. Those crowded seedlings only get free when I accumulate or free up a container to accommodate them. Here's the sibling which almost looks like an albino. From the same pod, also lived through two winters. Not much to it. I was sure it would die but it keeps hanging in there. That's only a 6" pot it's in. It's barely tinted green and it bleaches from there so the lower leaves tend to die. It has anthocyanin pigment in it. It obviously does not keep pace with the other seedlings. I expect it will die naturally sooner or later, but I'm curious about it. As a pod sibling, it may be an indication there is a genetic aspect to the paleness, but I think they both might green up more with the right diet. The little one grows in dappled shade, but the bigger plant gets lots of Texas sun.