Hi there!

First post of perhaps a few plant questions.
I've really started to get onboard with houseplants over the last couple months, but a couple of them seem to be having some difficulties recently that I'm not sure the cause of, or how to rectify. Hoping that the learned folks on this site may be able to shed some light on these issues so I can get these guys back to better health!

This is my tetrasperma. I got it from a friend who had gotten it as a cutting. Just before I got it it had apparently been having some trouble with root rot. I removed it from the medium I got it in (pure perlite), trimmed soggy roots, and repotted in fairly quick draining soil. It's since rerooted and seemed to be doing quite well and put out a fair amount of new growth, and then...

The leaves seem to be all be slowly turning a darker colour on the undersides of the leaves in a patchy pattern. The leaves themselves still seem to be fairly robust and haven't seemed to be really yellowing, and the colour change is only distinct when viewed from behind or when backlit. The plant itself is still putting out new growth (new leaf just about to start unfurling) but I assume this isn't a good sign and I'm hoping it's a remediable problem.

Thanks for any and all replies in advance!

Cole

Pictures:

It may be a nutritional problem: https://www.essentialhomeandga...

@Kevalsha,

Thanks for the response!
It's possible. I've been using a liquid 10-15-10 by Schultz on a couple waterings, and whether that's good or not, I don't know. Aside from that I'm not sure what else to say.

@gina1960

That is a common problem in aroids called 'edema' and it is exactly what it sounds like...the plant has taken up too much water too quickly and the leaf tissue has expanded in patches to accommodate it. Slow down on watering. Its a good thing that you removed it from perlite. I am not sure when all this silliness about 'fake soilless growing media' started. If you are going to grow an epiphyte (or a hemi-epiphyte, like Monstera or Rhaphidophora) in anything other than soil, it should be sphagnum moss. I know that people do this with Aliflor (LECA), Perlite and mineral substrate to attempt to keep from overwatering their houseplants. And when it works, I guess its great. But, its not what the great goddess meant for your plant to grow in. Its better to use things like Aliflor, pumice, charcoal, perlite and lava rock as soil AMENDMENTS that to try and pot in them, unless, of course, the plant you are growing is actually a lithophyte in nature, like A. clarinervium or A. reflexinervium. Which naturally grow in a very thin top layer of poor soil over Karst.
Welcome to the site, we do have an aroid page (much under-utilized) if you want to hang out there!