![]() You should deadhead blue hydrangeas as soon as the flowers have faded. To provide them with energy, add a few buckets of nutrient compost to the planting hole and mix it with the garden soil. Since many hydrangeas are rebloomers, they need plenty of energy. The second is that the soil should be nutritious and light. Use it strictly according to the manufacturer’s recommendations. ![]() You can buy this product at many garden centers and it is specifically for hydrangeas. To keep the soil acidic, use aluminum sulfate. Soil with a pH of less than 6.0 is acidic. Otherwise, the color can change to purple or even pink. To keep the hydrangea blue you need to provide it with acidic soil. The best substrate for blue hydrangeas is a slightly acidic and nutritious substrate. The first thing you need to take care of is the soil. In fact, there are some features you need to take seriously in order to maintain the blue color of the flowers. Next, we will talk in more detail about the growing conditions for this type of hydrangea. Also, the soil should be nutritious and well-drained. Since most blue hydrangeas are bigleaf hydrangeas, the best place to plant them is in partial sun. With enough fertilizer blooms very abundantly. Best planting location in the partial sun. In alkaline soil, the color will of course change to pink, and sometimes the pink intensity is so high that the flowers turn crimson or even red.Īs for cultivation, it is a fairly compact hydrangea, three feet across. In the photo, you can see the real color that everyone can achieve in their garden. If the pH of the soil is at least 5.5, the flowers of this hydrangea will be deep blue similar varieties are almost non-existent. Again, you have to have acidic soil to get the bluest blue. It is one of the bluest hydrangeas in existence at the time of this writing. And at the end of the list, I have a highlight for you – Mathilda Gutges.
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