Woman turns pink hydrangeas blue using household tea bags – Wales Online
Elaine Parker’s pink hydrangeas turned blue with the help of used tea bags, as shared on Gardening UK Facebook group. Other gardeners suggested similar tips like using rusty nails or iron debris to achieve the same result. The transformation in hydrangea bloom colour depends on the soil’s pH level, with acidic conditions yielding blue petals and alkaline soil painting them pink. Varieties such as hydrangea macrophylla or hydrangea serrata are known for their ability to change colour. Overall, the guidance from fellow gardeners provided a fantastic solution for turning pink hydrangeas blue.