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
The reliable Hydrangea Annabelle that everyone knows and loves now comes in pink! Invincibelle Spirit is a hardy, very easy to grow shrub suitable for any garden. It will bloom each year, regardless of pruning or extremes of weather.