Twenty rural businesses will pack up their wares and travel hundreds of kilometres for the event at Sydney's Martin Place on Thursday.

The pop-up market will give Sydneysiders the chance to meet bush makers and creators, browse their wares and have yarn face-to-face with some of the businesses they've been connecting with online.

Buy from the Bush, a grassroots response to devastating drought, started at Warren in mid-October and has gone on to capture more than 130,000 followers and interest across Australia.

Founder Grace Brennan, a farmer's wife, said the support from across Australia, particularly the city had been overwhelming.

"Having grown up in Sydney, I was really aware of how much people in the city want to show their support if given a chance," Mrs Brennan said.

"It gives city people a simple way to help rural people in need and people are enjoying exploring the beautiful things on offer in the bush.

"It's times like this that really highlights what Australians are made of.

"We rally and we help each other out during tough times.

"Martin Place is about as far as you can get from the dusty paddocks of these businesses' backyards so it's an exciting idea.

"We've received incredible assistance from major Sydney businesses like GPJ [George P. Johnson] and Harry the Hirer to bring this event to life."

The Buy from The Bush pop-up market will be held from 8am to 8pm or until sold out.