I've had this argument too many times, with too many folks to ever believe the excuse, " oh I don't have room for it"
With these plants, if there's a will, there's a way, or rather if there's a will, there's room...
Sorry to be argumentative today, I'm honestly trying to help, but you could literally use EE bulbs to top dress the plumeria pots, just chucked right on the dirt... They would be fine...
I hate losing and rebuying plants, you never know when something's going off the market!
I've been struggling to locate a C. Black marble for a friend, we both have owner this plant, I killed mine, he sold his, now it's pretty hard to find.