Propagating congea primarily involves softwood cuttings, as seeds can be unreliable. Key factors for success include warm temperatures, high humidity, and well-draining soil with good fertility. Use a rooting hormone and maintain consistent moisture during rooting. The challenge lies in providing the right microclimate. For best results, take cuttings in spring, dip in hormone, plant in appropriate soil, and cover with a plastic dome to retain humidity. Difficulty is moderate, requiring attention to environmental conditions.