North Harbour Rugby Union was formed in 1985 by clubs that broke away from the Auckland Rugby Union. The Hibiscus flower was chosen as the new union’s logo in reference to part of the union’s catchment area – the Hibiscus Coast. The North Harbour Rugby Union (NHRU), commonly known as North Harbour or simply Harbour, is the governing body of rugby union that encompasses a wide geographical area north of Auckland that includes North Shore City, Rodney District, the Hibiscus Coast and part of Waitakere City. There are 12 rugby clubs from Mahurangi RFC, based in Warkworth, Rodney District, in the north through to Massey the southernmost area of the union.