Two hemp growers at Cressy opened their farms to discuss the commercial viability of the crop at a field day on Thursday.
The farmers opened their fields up for inspection to raise awareness and provide information about the benefits to growing hemp.
Hemp Association of Tasmania executive officer Tim Castle said crop learnings, bio-controls, agronomics and financial considerations were discussed.
"Farmers heard about the commercial aspects of growing hemp, the practical issues of growth and monitoring, and they also heard from two farmers who already grow the crop, including Sam Bond who grew the best crop in Tasmania, and Lachie Toll who is a first-time grower," Mr Castle said.
"We talked about price, water usage and the application of nitrogen, such as when is the best time to put it on the plant to promote the most seed growth."
Mr Castle said a major benefit of hemp is that it left paddocks in optimum condition for following crops.
It also allowed farmers to maximise revenue potential by planting clover or lucerne at the same time as the hemp, which offered feed for livestock immediately after harvest. "You are optimising the paddock before the ground gets cool in winter and basically have a ready-feed food source in March," he said.
Bio-control methods to eradicate hemp-boring caterpillars, which can destroy up to 500 kilograms of seed per hectare, were also presented.
"We try and kill the caterpillars but you are monitoring to see when the moths come in," he said.
"The message from this field day is to monitor the emergence of these moths with pheremone traps to catch the male moths ... and you put sheets under the crop twice weekly."
Mr Castle said it costs around $1600 per hectare to put hemp in, and received an average profit of around $5000 for a two tonne crop, depending on individual costs of the crop. This year about 1600 hectares of hemp was planted in the state. Mr Castle said the amounts did not reach estimates due to fodder priorities.