[Nico's been here long enough to know that before now, plants outside the gardens weren't really a thing. So all this new growth is a big deal. He also avoided the gardens like a plague because, well, to plantlife, his powers kind of are a plague. One errant emotion, and everything at his feet wilts away. So he tries to avoid the plants as much as possible, which why he's sitting up on a halfwall watching and not on the ground like a normal person.]
Rain, rain
What do you mean, temporal effects?