The floral, scented lawn in Avondale Park in Kensington and Chelsea park is mown three to nine times a year as opposed to the 20 or 30 times that is standard for a standard British lawn.
It also provides better habitat for bees and other insects, is resilient to drought and requires no weed killers and sprays.
The lawn was planted by Lionel Smith from the University of Reading as part of a wider project sponsored by the Royal Horticultural Society.
Mr Smith set out to find an alternative to the traditional lawn amid fears that grass needs too many chemicals and water to sustain in a warming world of hosepipe bans and rising prices for fertiliser.
It has even been suggested the English lawn will become a sign of "social and moral decadence" as climate change makes it difficult to maintain grass.