Does anyone know anything about gardening?

I don't have experience of them.

However, imo you don't need some sort of pro space, but I do think they lend themselves to smaller gardens terraced houses with rich foliage.

I think the main consideration is a making sure they don't crack - suitable base, correct tiles, not too cold a location, etc.

Those tiles are beautiful and perfect for a smallish space. They are a complete bastard to lay, they have to go onto a glassily smooth concrete base with a flexible adhesive or they'll crack. Forget the already expensive cost per metre of the tiles, it's the prep that costs the real money and the adhesive isn't inexpensive (you'll need twice the manufacturer's claimed coverage).

But, they are gorgeous.