How to Fertilize Hydrangeas With Miracle-Gro

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 fertilization to thrive; however, they don't require special fertilization. All-purpose Miracle-Gro fertilizer is well suited for hydrangeas.

Hydrangeas

Designate a planting site with organically rich, well-drained soil. Spade or rotary-till the amendment into the soil for even incorporation. If you're uncertain about when to irrigate, water when the top 3 or 4 inches of soil is dry to the touch. Sprinkle a balanced, 10-10-10 granular fertilizer on top of the soil in March and May and after the hydrangeas flower. Frequent, severe pruning results in weaker plants. Leaf-spot fungi cause purple-margined, gray or brown lesions. Removing and destroying infested plant parts controls powdery mildew. Raking up fallen, diseased foliage and putting down a 3- to 4-inch layer of organic mulch prevents leaf-spot spores from splashing the shrubs.

Hydrangeas

Designate a planting site with organically rich, well-drained soil. Spade or rotary-till the amendment into the soil for even incorporation. If you're uncertain about when to irrigate, water when the top 3 or 4 inches of soil is dry to the touch. Sprinkle a balanced, 10-10-10 granular fertilizer on top of the soil in March and May and after the hydrangeas flower. Frequent, severe pruning results in weaker plants. Leaf-spot fungi cause purple-margined, gray or brown lesions. Removing and destroying infested plant parts controls powdery mildew. Raking up fallen, diseased foliage and putting down a 3- to 4-inch layer of organic mulch prevents leaf-spot spores from splashing the shrubs.