Codes of Practice

Industry Environmental Codes of Practice

HortNZ’s industry environmental Codes of Practice are being reviewed and updated to reflect the latest research, practices and decision-support tools. The codes of practice are aimed at supporting growers to effectively manage nutrient and sediment losses from their operations and meet regulatory compliance.

The updated codes of practice will be available June 2026.

Drafts for consultation

The two codes of practice below are in draft for feedback. We are particularly interested in feedback from growers with these types of operations noted.

Consultation closes 14 June. Please send feedback to ailsa.robertson@hortnz.co.nz. 

 

Drain Nutrient Solution Management Code of Practice

This Code of Practice is for growers with hydroponic or covered cropping systems. It provides a structured, risk-based approach to applying drain nutrient solution to land. Applying this valuable resource to land can support ongoing production of outdoor crops.

Drain Nutrient Solution Management Code of Practice - draft for consultation

Drain Solution Management Plan Workbook - draft for consultation

 

Vegetable Washwater Management Code of Practice 

This Code of Practice supports growers to manage water generated from washing fresh vegetables. It provides a practical approach to characterising washwater, storage and treatment options.

Vegetable Washwater Management Code of Practice - draft for consultation

 

Previous versions

A-Guide-to-Managing-Greenhouse-Nutrient-Discharges-2007.pdf

Greenhouse-Nutrient-Discharge-GoodPractice1.2-Feb-2020.pdf

Erosion & Sediment Control Guidelines for Vegetable Production 2014

Code of Practice for Nutrient Management 2014

Vegetable Washwater Discharge Code of Practice 2017

Minimising Soil Movement by Vehicles Off Farm 2019