Can you dye a white hydrangea green?

Yes, you can dye a white hydrangea green by using floral dye. To do this, mix green floral dye with water and then place the cut hydrangea stems in the solution. The flowers will absorb the dye through their stems, resulting in a green coloration over time. Keep in mind that the final shade may vary based on the concentration of the dye and the hydrangea's natural characteristics.