Why Is My Blue Hydrangea Turning Green?

Understanding Hydrangea Color Changes

A blue hydrangea shifting to green can happen in very warm climates, though the exact cause isn't always clear. Sometimes the plant reverts to blue after a year or two. As the season progresses, blooms naturally fade to light green before turning brown in autumn.

Possible Interventions

If the color change is undesirable, a hydrangea coloring agent (available at garden centers) can be watered in to help restore blue tones. Ensure the soil remains acidic, as alkalinity can also affect color.