The three giant terrariums located at different points in the showground link with our plant-hunting legacy.
Each contains an ‘exotic’ tree, a prized jewel that collectors of the past would have travelled the world to obtain.
The palm, once a symbol of triumph, and now the most widely-consumed oil on the planet, provides controversy today as one of the world’s leading causes of deforestation.
The olive, a symbol of the Mediterranean and longevity, is prized for its fruit which is currently the subject of research to help prolong life.
Pomegranates, originally from Iran, are now grown in many warm parts of the world. Biblical figures have been inspired by the fruit, which today is a popular 'superfood'.