If your environment is cold then a heat mat is a great help. The ideal temperatures for Phals is from 72F to 78F, however, a constant exposure below 40 might be dangerous for some species. The color of the leaves in your picture means you are giving it correct lighting. Good luck with your buds.
What do you think?
Maybe, oh maybe one will have some colour...fingers crossed.
It's a terrible picture, but my phone just wouldn't focus no matter what I tried.
I guess I like the "life is like a box of chocolates...you never know what you're gonna get" aspect of the tetraspis, so the pop of colour is a sweet surprise.