Here are some useful links.
Canterbury Croquet has information on Canterbury clubs and competitions
Croquet New Zealand has national information on croquet in New Zealand.
Croquet New Zealand’s facebook page
The World Croquet Federation is the international organising body for the sport of croquet
Croquet Scores has results of many club, regional, national and international tournaments in New Zealand and around the world
Jenny and Chris Clarke are club members. This site provides “courses” covering aspects of croquet such as Laws Training, Stroke-Play and Tactical Coaching, Lawn Care, and some fun stuff such as croquet trivia quizzes.
This site, by Dr Ian Plummer, collects together information concerning croquet in over 700 articles and presents coaching information intended for both complete beginners and world champions.