Standard Tree Evaluation Method - STEMô

Standard Tree Evaluation Method - STEMô

Following many years of collaboration and development from various stakeholder groups in New Zealand, this tree evaluation method was first published in September 1996 by Ron Flook.  It quickly became the most widespread method of evaluating heritage and notable trees for district plans around the country.  It is now used by more than 30 Councils in New Zealand. See the author's note.

In August 2012 the New Zealand Notable Trees Trust became the copyright holder of STEM™.  The NZNTT is indebted to the Flook Family for allowing the Trust to become the new home and controlling authority for this valuable tool.

STEM™ scores can be entered on records for trees listed on the New Zealand Tree Register.  This enables the benchmarking and comparison of trees around the country.

Copies of the publication can be purchased directly from the Trust or from Touchwood Books.

Local Authorities currently using STEM™

Dunedin Lower Hutt Thames-Coromandel Wanganui
Far North Manawatu Rotorua Wellington
Franklin Marlborough South Taranaki Whangarei
Gisborne Matamata-Piako South Wairarapa  
Gore Napier Tasman  
Hastings Nelson Taranaki  
Horowhenua Palmerston North Tauranga  
Kaipara Queenstown Lakes Upper Hutt  
Kapiti Taupo Whakatane  

STEM™ is a Trademark of the New Zealand Notable Trees Trust.
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