Normally I'd say only when I've overused my power, but with the way it's been acting since I got here I don't really want to depend on that as a given.

[ thus why he's taken to applying only a finger or two to the shrub walls as they walk now, just enough to be able to spot the dead patch if you know to look. ]

I'm pretty good at spotting them before they drop though, I'll make sure to give you as much warning as possible if it becomes a problem. Sometimes I can even hold them off, but that's not a guarantee either.