Changing hydrangea flower color with coffee grounds is a popular garden hack that could do more harm than good.Credit: Kritsada PanichgulKey PointsCoffee grounds do not significantly affect soil pH and cannot change hydrangea bloom colors.To alter hydrangea colors, use lime to raise soil pH for pink blooms or sulfur to lower pH for blue blooms.Excessive coffee grounds can harm soil ecosystems; composting them is more effective and sustainable fo…
This story is only covered by news sources that have yet to be evaluated by the independent media monitoring agencies we use to assess the quality and reliability of news outlets on our platform. Learn more here.