I'm sure you've seen beautiful hydrangeas of different colors. If you wish for a specific flower color on your hydrangeas, you may wonder: do you have to buy them that way, or can you change them ...

Hydrangea macrophylla (Bigleaf Hydrangea): This variety is most commonly affected by soil pH. It includes both Mophead and Lacecap types. The color change is most dramatic in these hydrangeas.

Changing hydrangea flower color with coffee grounds is a popular garden hack that could do more harm than good.