Does he mean a garden...?

John finishes tying his laces and squints up at Ianto, pushing to his feet and shoving his hands into his pockets to check for his keys and wallet.

"Yes, Ianto, a garden. That's generally where gardening happens."

Right? Does... garden have some alternative meaning in Wales? He lofts an eyebrow, tilts his head toward the door in a silent question. Are they ready, or was there something else Ianto needed before they head out?