In addition to a dramatic collection of trees and shrubs the Arboretum is home to a series of themed plants including a fern gully, meadow and a collection of Plants from High Places.

All of the plants grown within Plants from High Places come from mountainous parts of the world. Six beds have been planted with species from the Pyrenees, the Pindhos Mountains, the Himalayas, the Drakensburg Mountains, the Chilean Andes and South Island of New Zealand.