Help my sad money trees!

[Anonymous]

I have two potted money trees (pachira). I've had one for 2 years and one for just a few weeks, but both are doing poorly. My other indoor plants are happy, so there must be something I'm hosing up for these particular plant friends.

Tree #1 is about 12 inches tall, I've had it 2 years and repotted it once. It was doing great until Christmas when I moved it to another (warmer but less sunny) room. Ever since then its leaves have been turning yellow and dropping. It does have a tiny bit of new growth, but the older leaves are yellow and limp.

Tree #1 is over 24 inches tall, I just bought it at Costco a couple weeks ago. (It is isolated from my other plants.) It looked super healthy when I brought it home but has quickly gone south. It's suffering in a different way from #1. The leaves are crispy and curled up. Some have brown/white discoloration. The new growth has largely wilted. I did bring it home on a sub-freezing day and it briefly sat near a doorway so I wonder if it got frostbit that quickly?

Any ideas?

[Anonymous]

Yellow is most commonly overwatering, or root rot. White is usually too much direct sunlight.