1939 recent innovations in this park have been a fine dahlia border, and a series of beds constructed along each side of the central walk. Other recent features have been specialized displays of such blooms as stocks, dahlias, lupins, etc., in the addition to a border which is used exclusively for the grouping of novelties and the many half hardy annuals all of which are plainly labelled in order that interested visitors may become acquainted with unfamiliar plants.
Source: Nottingham Official Handbook 1939 The Arboretum
Joyce Killowe – Own photo of today’s dahlias Sept 2013