Tom Hart Dyke converted the castle's 2 acre walled gardens into a World Garden of Plants to raise funds for the upkeep of his ancestral home. Plant species from around the worldand arrange them as a . The design of the World Garden is a (roughly drawn) map of the world consisting of shaped beds. Plant species from around the world are planted in the map according to their country of origin. Notable specimens include a Wollemi Pine and Silver Princess Eucalyptus Caesia.