Wellington: New Zealanders will be able to have their say on whether they want to see cannabis legalised at a referendum during the next general election in 2020.

The referendum will a simple Yes/No question on the basis of a draft piece of legislation, Justice Minister Andrew Little announced on Tuesday.

New Zealanders will be able to have their say on whether they want to see cannabis legalised. Credit:AP

The draft legislation would include a minimum age of 20 to use and purchase recreational cannabis, regulations and commercial supply controls, limited home-growing options, a public education program and stakeholder engagement.

Little said the coalition government was committed to a health-based approach to drugs, to minimise harm and take control away from criminals.