Use a 10-10-10 granular fertilizer. Apply the fertilizer at a rate of 1.5 ounces for every 10 feet. Broadcast the fertilizer around the oak leaf hydrangea once in the spring and once in the summer.Click to see full answer. Similarly, what is the best fertilizer for hydrangeas?Fertilizing: Hydrangeas do especially well when fertilizers are effectively used in spring or early summer. We recommend using a granular, slow-release fertilizer with a high percentage of phosphorus (the middle number in the NPK ratio). Phosphorus is the element that encourages bloom production. how fast do oak leaf hydrangeas grow? This shrub grows at a slow to medium rate, with height increases of anywhere from less than 12″ to 24″ per year. Additionally, how do I get my oak leaf hydrangea to bloom? Dig 2 to 4 inches of compost, moistened peat moss or manure into the soil to a depth of 8 inches prior to planting oakleaf hydrangea. These amendments improve drainage and add nutrients, which can promote healthy growth and blooms.Is Miracle Grow good for hydrangeas?Gardeners who want robust and healthy hydrangeas must focus on providing enough sunshine and water for their plants. Hydrangeas also require fertilization to thrive; however, they don’t require special fertilization. All-purpose Miracle-Gro fertilizer is well suited for hydrangeas.
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