I mean... most of them can't! Definitely not ones that are all fluffy and cute and you're trying to reintroduce into the local ecosystem! But there's... outside of Solar System Equivalents, stuff can get mad sticky out in space. But I guess... by the point it's alive and hurting people, it's not a tree anymore, it's in Kingdom Florafauna, so...?

[ She sighs, rubbing her temples. ]

Intergalactic Zoobotany is not something you need me rambling about right now. Forget I said anything. People who wipe out species suck major butts, full stop.