No doubt it's being kept indoors, if it is Sageretia. I'll try to get photo comparison this weekend of Sageretia starts I worked with this year. At first, they grew equally as well. But, after a few months, the one kept indoors began to fail. It's still limping along, but barely has any life in it. By contrast, I've pretty much ignored the one outside, which is now two thanks to an air-layering off of the lollipop top. No, I take that back, there are also some cutting of this year's growth that are also rooting. The airlayer rooted in only a few weeks, nicely and strongly, too. Moral of the story: Sageretia are truly weeds outside. Inside, they slowly fail. I'm hoping mine make it through the winter indoors, but if not, I won't be trying them again.