Floriade is one of the world's biggest gardening and horticulture expos - and it has cost taxpayers in the Dutch city of Almere nine times as much as originally budgeted. So why did organisers go ahead with the project, and was it still worth it – despite hugely disappointing visitor numbers? Matthew Kenyon talks to advocates and critics of an event which may be the last of its kind in the Netherlands. Presented and produced by Matthew Kenyon. (Image: Floriade. Image credit: BBC)