When it comes to genetics, Blimburn Seeds doesn’t mess around.

Sergio M is the weed celebrity you may not have heard of, but you’ve definitely seen his work. As his native Spain became a seed-production hotspot in the early 2000s, this genetics wizard started working behind the scenes with some of the biggest names in cannabis—and still does through Blimburn Seeds, a seed bank trusted by growers throughout the world.

Through Sergio’s friendship and collaboration with cannabis icons Kyle Kushman and Steve DeAngelo, he was the first to bring American genetics, including Granddaddy Purple and GSC, to Europe. Now, Blimburn supplies seeds for more than 600 strains. Their feminized seeds are uniquely stable, meaning they aren’t prone to…

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