Beware this Halloween: Poisonous plants that may be growing near you

Fiann Ó Nualláin gives a Halloween countdown of the world’s top poisonous plants which may be growing in a flower bed near you.

Scarier than fireworks, and more ghoulish than you may have suspected, the five deadliest plants on the planet could be outside your front door now. Let the countdown commence...

Number 5: Hemlock