Posted: 04/03/2015 at 17:51
My trusty Collins Cobuild dictionary does not mention an active verb "to lawn" or a passive verb "to be lawned". A lawn is therefore made, seeded or created but a lawn is not lawned. However, the prefix "be-" may be added to a noun followed by an "-ed" suffix in order to indicate that someone or something is covered with a particular thing. So you could say that the garden is "belawned" I suppose.