Spent a couple of hours creating some trees and bushes inside of Blender too. Needed to have a bit more viney and twirly feel to them, since it's supposed to be alien'ish. I'll be sure to sculpt some knots on the silhouette before I add a tiling texture. I also made a few "trees" that has aggressive shapes for the look of the environment, gonna be a whole mess of vines tangled in them together with some leaves. The roots look like garbage since I just threw them in there. The leaf is a placeholder mesh I created for the particle distribution based on painted weight. I'm going to create a set of leaves inside of Substance Designer tomorrow.

