Each Grey to Green paving slab costs around 90 SEK (US$14), though the final price depends on which particular design is chosen. Source: Caroline Brahme via NOTCOT.

Of course, gravel won’t be as sturdy as traditional paving slabs. ‘With gravel, ... Autumn Brown and Kandla Grey – are hard-wearing and start at £25/m 2. 'Plus, ...

IF YOU are looking to change your back garden or roof terrace from concrete and weeds into a green oasis with minimal time and effort, then look out for Matt James' new book, The City Gardener.