This book provides information on physical and mechanical properties of selected eucalypts hybrids GU7, GU8, GC540, GC550 and GC796. The author assess the variations of the properties across growing sites, along tree height and from pith to bark; and compares the properties of hybrid material with parent materials; i.e. Eucalyptus grandis, Eucalyptus cammaldulensis, and Eucalyptus urophylla. The book further shares some notes on the suitability of hybrid eucalyptus timber for fuel wood and construction works and therefor provides justification for including clonal forestry for saw-log production in Uganda.