Company representatives who appeared on the television series Dragons' Den will address the Farmers' Union of Wales annual general meeting this month.
The company, which turned down an investment proposal worth £160,000, invented a sleeve that prevents fence posts from rotting and collapsing.
Brothers Richard and Jim George developed the protective fence post after the EU ruled only environmentally-friendly preservatives could be used to treat timber fencing.
Sales of their product rose 75% after their appearance on the BBC2 show.
FUW Brecon and Radnor county executive officer Aled Jones said: "This is an issue that is brought up again and again at our monthly meetings and the evenings should be very informative in explaining the background to the problem and the potential remedies."
"I would urge members to attend and also bring along a friend. Refreshments will be available."
The meetings will be held on February 20 at Brecon Rugby Club (for Brecon, Sennybridge and Penderyn sub-branches) and on February 28 at the FUW Pavilion, RWAS Showground, Llanelwedd (for Builth, Llanwrtyd, Penybont and Rhayader sub-branches). Both meetings will start at 7.30pm.
