Turning Blue Hydrangeas Mauve: Adjust Soil pH

Your greenhouse-grown hydrangea was forced into mauve by precise pH control. In Georgia's naturally acidic soil, it reverted to blue. To shift toward purple/mauve, apply a cup of garden lime around the plant now and again in August to raise pH. Easier long-term: choose a variety that leans pink naturally, like 'Endless Summer' or 'Pia'. See bit.ly/purplehydrangea for details.