You need to finish Alfyn’s Fourth Chapter to unlock this. Travel to Northreach, in the Frostlands, where you’ll find Ogen near the weapon shop. After initially speaking to him, head into the northern area to find him at his wife’s grave. He mentions that he wanted to bring some of his wife’s favorite flowers to her grave, but they don’t grow here anymore; they are called Mind-me-always. Make your way to Victors Hollow and look for the Flower Girl south of the Provisioner. Steal/Purchase the Mind-me-always from her, the bring it back to Ogen to complete the quest.