Castle Howard's arboretum represents one of the most exciting horticulture and botanical experiences in the country. In 1975, the late Lord Howard and James Russell, started the planting of one of the most impressive collections of hardy woody plants in Europe. Ray Wood has a wonderful collection of rhododendrons, some 500 species and 300 important hybrids, along with many other rare shrubs and trees. In the arboretum, a native flora of species-rich grassland, dotted with orchids, bog bean and king cups, nestles beneath exotic trees collected  from all over the temperate world, providing a landscape that is unique.

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