I discussed using the temperature-based growth potential (GP) to make comparisons between locations. The chart with 33 locations around the world is in this post: https://www.asianturfgrass.com/post/gp-as-proxy-for-season-length/

Here's the climate appraisal form from: https://www.paceturf.org/index.php/journal/climate

My "Short Grammar of Greenkeeping" book is available at https://leanpub.com/short_grammar_of_greenkeeping

My "Micah no jikan" book is available at https://www.amazon.co.jp/dp/4772841725/ref=cm_sw_r_cp_ep_dp_U-eyAbHH25ZNN

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Watch this episode on YouTube at https://youtu.be/DhfEmtrYDBo

Find out more about soil tests with ATC at https://www.asianturfgrass.com/project/soil-tests/