[2] Today the arboretum contains more than 11,000 labelled plants of over 2,500 taxa, representing the temperate floras of North America, Asia, and Europe.

Significant collections include native azaleas, conifers, hollies, magnolia species, maples, roses, and witch-hazels.

atlantica 'Glauca', Cercidiphyllum japonicum, Fagus sylvatica f. pendula, Metasequoia glyptostroboides, Pinus bungeana, Platanus × hispanica, Quercus alba, Tsuga canadensis f. pendula, Ulmus glabra 'Horizontalis', Ulmus parvifolia, and Zelkova serrata.

The arboretum is set within a fine, mature landscape, primarily designed in the English park style but with Japanese influences.

It includes winding paths and streams, a swan pond, formal rose gardens, and large sweeps of azaleas, rhododendrons, and magnolias.