Standard Tree Evaluation Method - STEM™

Standard Tree Evaluation Method - STEM™

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 40 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.

Local Authorities currently using STEM™

Carterton Manawatu Rotorua Waipa
Dunedin Marlborough Selwyn Waimakariri
Far North Masterton South Taranaki Waitaki
Gisborne Matamata-Piako South Waikato Wellington
Gore Napier South Wairarapa Western Bay of Plenty
Hastings Nelson Tasman Whakatane
Hauraki Otorohanga Taupo Whanganui
Horowhenua Palmerston North Tauranga Whangarei
Kaipara Porirua Thames-Coromandel  
Kapiti Queenstown Lakes Timaru  
Lower Hutt Rangitikei Upper Hutt  
                                                                                                                Updated 05 Dec 2019

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