Mine are all outside but when they get a bit too dry and stressed some of the older leaves will develop that sort of blotchiness. I think the plant decides it has too many leaves to support and begins the process of shedding some of the older ones. I never fertilise mine, as semi-epiphytes they don't need much. Of course a bit wouldn't do any harm, especially if they're in pots with restricted root space. In a garden falling leaves and insects are enough.

Something like you would use for an epiphytic orchid would be good. The main thing is to have a 'generous' amount of breathing holes around the roots. That's something that ordinary potting mix wouldn't give you.Just remember that in time the organic component of the mix will break down and the remaining soil will become compacted. That would be a good time for repotting again.

Hi there. I have two of these plants. One's pretty healthy and the other is a bit of a big box store rescue. When I first got the rescue, the soil was soaking wet. I put it in sunlight and the leaves turned a yellowish speckled color, similar to your first picture. It's doing okay but it's not put out any new leaves. Also, I just noticed that my healthy plant has a leaf or two, closest to the soil, with some yellowish speckles (see 2nd picture) but I don't remember if it was like that when I got it. It puts out new leaves regularly and they look pretty similar to your new growth leaves, just with a few more fenestrations. Hope this helps some and I hope your plant is a-ok.

Emily, both varieties are the same species with slight differences in appearance, but they aren't different enough to be considered separate species, or subspecies. I don't how many differences they have to each other, but the leaves definitely are different, the wide form leaves have many more holes. The plant in your photos may be an immature specimen that will have more cut leaves later on. I think it's interesting that Epipremnum get cut leaves on very mature plants. I just found that out recently. Apparently they never bloom either, even when mature, and have to be treated with chemicals in order to coax a bloom. So subspecies, variety, forma. Can anyone explain the differences between them?🤣 https://www.facebook.com/groups/831467203592108/?ref=share