Tasmanian Gourmet Sauce Company director Tim Barbour said the business's role in 20-episode series ?Sudden? helped the business come to the forefront of the Asian market.

``Four years ago, we would have one person a week from Hong Kong would have been a lot,'' Mr Barbour said.

``It's extraordinary for the economy.''

A producer from the television show returned post-production to work on the Evandale property. 

Mr Barbour later enlisted her help in creating signage for Asian visitors.

He said the thought paid dividends.

Another recent addition, a potager garden, had tourists enthralled.

``Sometimes we take a long time to realise we're not number one in the world, Anglo-Saxons,'' Mr Barbour said.

``A lot of these visitors live in high-rises in cities, so they don't see vegetables growing. It's given us a real buzz.''

The company benefited from Tourism Tasmania's Visiting Journalist Program, which sees celebrities from Asia visit the state under the sponsorship of the organisation.

Tourism Northern Tasmania chief executive Chris Griffin said the region was still carrying significant growth out of Hong Kong.

He mentioned Northern companies Bridestowe Lavender Estate and Beauty Point's Seahorse World as particularly benefiting from the same market.

``There's no perfect science but when we do get it right, the resonance can go on for five or 10 years,'' Mr Griffin said.