Can plants encourage each other?

[Skycat]

I have this one mini Phal that ended up losing most of its roots, and the leaves are dehydrated. But for a while, it's been working on putting out three new roots and a new leaf. Is it helpful that I have it near all my healthy Phals? I mean, obviously it can't guarantee anything (and obviously I'm doing something right to have most of my Phals be healthy in the first place), but it does seem like it could be a thing that happens, y'know?