Hydrangeas, recognised for their abundant and attractive cluster flowers, are surprisingly easy to manipulate in terms of colour—a fact often overlooked by gardeners. Gardening aficionado Jill Raver ...

Hydrangeas are one of those hardy perennials that can feel almost magical: One year, your neighbor has a surge of sky-blue blossoms, the next they’re a blushing pink. But hydrangeas changing colors ...

How do I make my pink hydrangea produce blue flowers? — Andrew Hydrangeas are exceptional in that the color of their flowers can change depending on the availability of aluminum ions. Available ...

Hydrangeas are exceptional in that the color of their flowers can change depending on the availability of aluminum ions. Available aluminum ions make the flowers blue. Aluminum ions are most available ...