Look for hydrangeas that are bred to be blue such as 'Nikko Blue', Endless Summer The Original, … See more

Although doing this may sound like complicated chemistry, it's not. All soil has a pH value that measures its acidity or alkalinity. The pH scale is from 0 to 14; 7 is neutral. Soi… See more

For true blue hydrangeas, the plants need to be grown in acidic soil with a pH of 5.5 or lower. For pink flowers, the plants need neutral to alkaline soils (pH 6.5 and higher). For purple … See more

Most garden soils tend to be neutral, so you'll need to amp up the acidity to go blue. You can do that in a variety of ways. Organic acidifiers include sulfur and sulfate. There are a… See more