The Country Women's Association has thrown its support behind legalising medicinal cannabis at its annual conference in Tamworth.

The Association passed two motions, the first in support of the use of medicinal marijuana, and the second in support of the legalisation of growing, manufacturing and distributing marijuana for medicinal purposes.

State President, Tanya Cameron, said there was a fair bit of debate about the motions.

Ms Cameron said members had to think hard about their decision but a good majority were in favour of both motions.

"At the end of the day the members decided that they were voting on the principle of the idea of supporting the use of medical marijuana and that it was an opportunity for us to perhaps change that legislation," she said.

"It's more a case of us adding our voices if you like to those that are already calling for the legalisation of medicinal marijuana."

The Association last voted on medicinal cannabis more than 10 years ago.

"We know a lot more about it now than perhaps we did when we last voted on this same topic," Ms Cameron said.

"There was some discussion about whether it was 2002 or 2003 but it certainly has [been discussed before] and at the time it was a tied vote and the President used her casting vote to keep the status quo so the motion was actually lost that time.

"But this time they both went through."