Dirr’s Hardy Trees and Shrubs: An Illustrated Encyclopedia

A well illustrated encyclopedia, with 1650 colour photographs, describing the best woody plants adapted to cooler climates, showing both habit and details of more than 500 species, and including some 700 additional cultivars and varieties. Brief cultural information is supplied for each plant, as well as Dirr’s perceptive comments and opinions.
Written primarily from the perspective of gardeners in the cooler parts of the USA – zones 3-6 i.e with minimum temperatures from 0 C to -40 C, this is still a relevant work for areas such as Northern Europe and the UK as well as warmer climates were most of the species will still grow.