There are two plants in this story: a plain Epipremnum aureum with no variegation and a Marble Queen.
The plain one has been growing all over my apartment for years, hundreds of leaves, some in low light, some in the sun, some attached to a substrate, some just hangin' out. None of them variegated.
Then one day, it grew up next to the Marble Queen and their roots held hands. And from that point on most of its leaves have been variegated.
I'm aware that more sun can lead to variegation, but I don't think that's the cause: here's a picture with lots of Pothos on the right getting heaps of sun, none of the leaves variegated, but on the left is where the variegation is happening (they're cuttings obviously, not physically the same plant, but all from the same base plant).
Here's a close up of where it met up with the Marble Queen and started being variegated. It's it a bit hard to make out what's what, the red arrows are the leaves of the previously-plain plant. There's a neon cultivar in there too, not part of the story.
From everything I've read, there's no such thing as 'contagious variegation' so I can't work out what else would cause the change. The only other thing I can think of: this is the only point where it's attached its roots to solid wood, but the very first variegated leaf came out before it attached to the plank.
What do you think's going on?
