He files away 'the Garden' as something to ask about later. The more he hears about what Crowley's life was like before, the more he wants to help him have a better life in Magisteria, away from the crappy work environment he had.

Which apparently involves... having casual sex, apparently?

"I see. They," the plants, "are quite impressive. I like them."

He means it.

But he hasn't been invited over to admire Crowley's plants. He shoots Crowley a sidelong look. "Show me your bedroom?"