French Hydrangea: Blue or Pink Blooms? Your hydrangea is simply responding to the soil pH. Blue flowers are produced in acid soil (pH and lower), and pink flowers are produced in alkaline soil (pH 7 and higher). You can add aluminum sulfate around your Diy Garden, Dream Garden, Lawn And Garden, Garden Plants, Garden Landscaping, Blue Garden, Hortensia Hydrangea, Hydrangea Colors, Hydrangea Paniculata
{}