Hydrangea Flower Turning Green. They take about a week to air dry in the summer or fall. One can acidify the soil all one wants but if sufficient levels of Al are not present the flower color wont change.
In fact that colour might last for weeks at a time and then suddenly your hydrangea turns to green again as the days start to shorten. Our white one starts to turn pink as the season moves towards autumn but the following year it will flower white again. But if your hydrangea with green flowers is any of the other types and the blooms refuse to change youre the victim of one of Mother Natures occasional pranks and horticulturalists have no explanation for the condition.
All hydrangea blooms turn different colors as they age.
A fertilizer low in phosphorus and high in potassium is helpful in producing a good blue color 25530 is good. 17112020 Oregon State University Extension Service states that drip irrigation is the best way to go. As the others suggest just wait for new flowers. 02042020 Keeping this in consideration do white hydrangeas turn green.