Hydrangeas are flowering shrubs that put forth large, showy blooms during the summer. Gardeners who want robust and healthy hydrangeas must focus on providing enough sunshine and water for their plants. It's also important to prune hydrangeas after they blossom so that the shrubs can develop next year's flower buds. Hydrangeas also require fertilisation to thrive; however, they don't require special fertilisation. All-purpose Miracle-Gro fertiliser is well suited for hydrangeas.
Mix the Miracle-Gro fertiliser with water according to package instructions for the size of your hydrangea shrubs.
Apply the Miracle-Gro fertiliser every other time you water, about every two to three weeks. Pour it onto the soil under the shrub, being careful not to get any fertiliser on the foliage. Doing so could burn the tender leaves and blossoms. Immediately rinse off any splashes.
Generously water the shrubs immediately after fertilising to prevent the fertiliser from burning the uppermost roots of the shrub.
If you are concerned about low acidity in your soil, fertilise with Miracle-Gro's Miracid once per week during the growing season. Miracid is a soil acidifier that helps boost soil acidity. Generously water hydrangea shrubs immediately after fertilising with Miracid to prevent the fertiliser from burning the uppermost roots of the shrubs. Miracid also helps encourage hydrangea blossoms to bloom blue.