If the main root has "eyes, " the small round nubs from which a new stem emerges, make sure each baby you cut off has one of these.

WSJ: In the Garden, Divide and Multiply: Weekend Gardener

Mr Hardcastle, of consultants Kellogg Brown and Root, said the main recommendation was for an "area-wide" charging scheme which would use satellite technology to monitor the journeys of all motorists and charge them per mile.

BBC: Tolls 'would curb M25 traffic jams'

After the next election, all main parties have committed to holding a root-and-branch review of all military services.

BBC: New army head in pledge to troops

"However, to date, the root causes of the two recent industry Li-ion main batteries incidents remain unexplained to the best of our knowledge, " Airbus said.

BBC: A model of the A350