Hydrangea macrophylla, also known as "bigleaf," "French," or "mop head" hydrangeas, are the most common and have blue or pink-hued flowers that can change color based on your soil's pH levels.

Hydrangeas are a popular flowering shrub thanks to their large blooms and extended flowering season. However, one common ...

If you've always wanted pink and purple French hydrangeas but your plants stay stubbornly blue, try this soil amendment that's hiding in your fireplace.