Species selection and diversification

There are several factors which influence species choice including the impact of present and future climate change, the need to include a diverse range of species to increase the resilience of the overall tree population. More details are provided in TDAG’s guides: Tree Species Selection for Green Infrastructure and Trees in Hard Landscapes: A Guide for Delivery, section four on Species Selection Criteria.

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Building identities through tree diversification
Greater Lyon, France 
​The goal set by the Greater Lyon Tree Charter for trees in streets and public hard landscapes was that no single species should represent more than 10% of the whole while taking account of local landscape character and identity.

greaterlyoncasestudy.aw.pdf
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Wise microclimate tree selection for Cheapside 
City of London, England
Cheapside runs east-west with trees planted along the north facing and south facing sides. To accommodate the significant differences of microclimate on each side of the street, the species selected represented those most suited to these two environments.

cheapesidecasestudy.aw.pdf
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