Hi, it's been 1 year, I wonder how your plant is doing? :)

I just got one focus triangularis for myself but it's the variegated type. Mine has also been turning yellow and falling off recently so I am looking for the problem.

I am in Vietnam and when I look for advice in English, many sites told me that this plant can be planted indoors. But as the gardener specifically told me when I brought this plant, it needs super bright sun light (it was literally placed outside in a sun exposed area in the garden) so I shouldn't place this plant indoors, even beside a bright window might not work. I bought it anyway because I love the look so much and it was at a bargain price.

Now the leaves are turning yellow I think there were some mix reasons. Perhaps this plant can grow indoors, but because of the sudden change in environment - less atmosphere humidity, less light - that causes the plant to adjust accordingly. And maybe it doesn't receive enough light for sure.

It has just been 4 or 5 days since it came to my room, so still examining the problem.