The next step for Gerald, Iwan, Owen and a growing group of farmers and growers is to grow Welsh black oats season-on-season, bulking out the small remaining supply of these seeds.
"We've now created the Llafur Ni Network, which means 'Our Cereals', with Katie Hastings who comes from The Gaia Foundation", says Gerald. "Katie has come across other farms in Wales who have old seed and brought us together to create Llafur Ni, pulling people together from all areas of farming."
Together, the members of the Llafur Ni Network are also making strides to revive other heritage grain varieties. It's a process that is bringing back older, better ways of farming that are closer to the land, which Gerald says is just what we need at a time of climate change.
"Coming up here, meeting Iwan, threshing together, and sharing what we know about cereals, it's been so important. It's brought the old language and the old way of thinking together and brought back respect to the old ways", says Gerald.
"I believe that these old ways are what is going to create food for us, keep us in food, in this world where we're experiencing disease and the weather is changing. Rebuilding diversity together is more important than we can possibly realise."