Use BBC.com or the new BBC App to listen to BBC podcasts, Radio 4 and the World Service outside the UK.

Find out how to listen to other BBC stations

Radio 4 Extra,13 mins

Plants: From Roots to Riches: Taming the Exotic

Plants: From Roots to Riches

Available for over a year

Prof Kathy Willis examines the Victorian race to flower the Amazonian water lily.

Programme Website