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Welcome to the RNZIH

Royal New Zealand Institute of Horticulture Inc.

Membership appeals to people from all walks of life. Professional horticulturists to keen gardeners will benefit from the quality of information and access to knowledge offered by the Institute.

Our affiliated trusts

NZ Notable Trees Trust

NZ Notable Trees Trust (NZNTT): A record of the notable and heritage trees that have been registered by the RNZIH since 1977 and the Notable Trees Trust since 2007/08.

New Zealand Gardens Trust

NZ Gardens Trust (NZGT): Established 2003/04 to ‘Promote the best in New Zealand gardens and horticulture’. The NZGT website features a nationwide database of public and private gardens to visit.

NZ Education Trust

RNZIH NZ Education Trust (NZET): Established 2004 to ‘Assist and promote, in any way possible, horticultural training and education at both the regional and national level in New Zealand’. Organising the presigious Young Horticulturist Competition are one of their main activities.