While it is good news that a sustainable garden has won a prize at Chelsea flower show (Garden with terracotta 3D-print bricks wins Chelsea flower show green medal, 20 May), surely all of the gardens should be environmentally sustainable? Otherwise what are we saying, that you can garden either way? This is ludicrous, given the vital need to stop doing anything unsustainable.
Dr Jennifer Poole
Romsey, Hampshire
• A garden made from 3D-printed bricks uses an awful lot of energy printing the bricks. If Giulio Giorgi wanted to give his garden a low carbon footprint, why didn’t he have them made by hand?
James Driver
Chiddingfold, Surrey
