Thursday, February 28, 2008

ISA HK/China --- 2008 reaearch on Tree Staking

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Dear Station Members,

Attached is the latest research published by ISA on Tree Staking.

Tree Staking is a requirement in nearly every landscape contract in HK & China nowadays. The general spirit is that it should be done with the strongest material as possible & should be there for as long as possible, because it is thought that Tree Staking would stabilize the tree in wind & storm. Another obvious reason for staking may be the undersized rootball of nursery trees coming in from China which can not stand itself after installation & would require staking. On the other hand, if a wind force of typhoon magnitude would strike directly upon a tree secured with a rigid staking system, maybe if the system can stand the wind, the tree is likely to break or snap (basic Tree Biomechanics).

HK is full of Tree Staking lasting for years, especially in the private sector. Some stronger one even appeared to last forever. This latest ISA research has given comparison for the pros & cons of Tree Staking & has provided the latest information on current practice. If anyone would disagree with it, please give this Station the opposite research (not a point of view or from a coffee magazine, please) & we are obliged to publish it to show the world. This Station is always fact-finding & truth-telling, & we worship nothing but fact & truth.

Therefore, should our territory carry on the 'permanent staking' for our trees which is required in nearly every landscape specification today? Is the money thrown into Tree Staking justified for the result? Do we get better trees, or poorer, in this manner ?

Please try to find the answers to these questions in the attached article.

best regards,

Sammy Au
Station Manager

The ISA Mission - Through research, technology, and education, promote the professional practice of arboriculture and foster a greater public awareness of the benefits of trees. (

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