More than 60 firefighters battled a blaze at Ruxley Manor Garden Centre in Sidcup yesterday after a fire broke out in the early afternoon.
A 300m cordon was set up around the centre and part of the A20 closed because of the risk of explosion from gas canisters on the site.
The fire, which is thought to have started in one of the centre's warehouses, was brought under control by early evening and, according to reports, is being treated as an accident.