Between the lime avenue and the woodland garden what was an area of rough pasture has been transformed into an arboretum with an outstanding collection of ornamental trees. Mown paths wind between areas where the grass is left unmown for spring bulbs and later flowers such as snake’s-head fritillary to thrive, and the collection of trees is notable for the different varieties of birch, sorbus, malus and robinia.
Below the arboretum, back towards the house, an old tennis court has been the scene of the latest transformation, into a new gravel garden that was completed in 2003. The garden brings a contemporary note to Goodnestone, with its path leading from one side to the other, between bold plantings of perennial grasses and other striking foliage perennials such as euphorbias and eryngiums, all growing out of gravel. Towards the centre a paved area and seat have been positioned to enjoy the view towards the house and a glimpse of the park beyond.