"Not all of it. But a good bit." Neville's hand would be rough and calloused but warm as he shook Sirius' and he tried to seem welcoming. Even though he'd been pulled from his life as much as anyone else's, he'd been one of the first from their world and had time to get used to the place before the multi-generational parade had begun, plus he was from a time much closer to the one they seemed to be in now. He couldn't quite fathom the shock it must be to take in all at once.
He quickly cleared off a table with some chairs tucked under it, half with magic, half with his hands. He wasn't sure if Sirius would want to sit or rather move around the greenhouse, but he wanted to offer the option.
"A lot of my plants from Hogwarts showed up after I'd been here a few weeks. I fit what I could here and there are a few in my room. But some of the things here are from other places too." Neville tended to the ones that didn't seem to be cared for, unsure if they had come from the hotel or from people who had left, but he left the ones that seemed to belong to other people mostly alone.
"Tea?" He offered, because his grandmother had raised him to never invite someone to your home without offering it. And while this wasn't exactly his home, it might as well have been.