Tea is one of the world’s most widely consumed beverages, but the soils that sustain tea plantations are under growing pressure. Long-term fertilizer use, monocropping, soil acidification, nutrient loss, heavy metal contamination, and climate stress are threatening both tea productivity and environmental safety. A new review published in Biochar examines how biochar, a carbon-rich material produced by heating biomass under limited oxygen, could become a practical tool for more sustainable tea cultivation.