Blue hydrangea


Hydrangea is a very popular plant both in garden beds and in pots to embellish balconies, due to the important flowering and its color, which can vary from magenta, to blue and pink. Hydrangea is a perennial, hardy and easy to grow shrub that belongs to the Hydrangeaceae family, native to Asia and the Himalayas. They consist of a sturdy stem and oval leaves with toothed edges. The inflorescences have a rounded or elongated shape depending on the species and are made up of numerous small flowers whose color is determined in part by the genetics of the plants and in part by the ph of the soil. With an acid ph, of value 5 or 5.5, we are in the presence of blue hydrangea, if the ph is between 5.5 and 6.

How to get blue hydrangea

Given that the blue color of hydrangea largely derives from the characteristics of the soil, it is easy to understand that it is enough to act on the acidity of the earth in which the plant is planted to influence its color. To do this we can rely either on the original characteristics of the earth, therefore already present naturally, or on the use of suitable soil and the addition of fertilizers and components suitable to create the pH value necessary for the purpose. If we are in the presence of pink or purple hydrangeas and we want to obtain blue hydrangea, it is sufficient to start irrigating the plant with a mixture of water and sulfur, calculating about 130 grams of sulfur per square meter. Alternatively, approximately 3 grams of aluminum sulphate can be added for each liter of water. In a short time it will be possible to obtain blue hydrangea.

Cultivation of hydrangeas

Hydrangea, regardless of the color assumed by the flowers, is a perennial plant that loses its leaves in winter and starts to vegetate again in spring, it is very resistant and does not require special attention. However, it loves humidity and dim areas. Its best habitat is in the shade of large plants that filter the sun’s rays, sheltering it from direct rays especially in the summer, and where it can grow luxuriantly and give spectacular blooms. During the hot summer days it is possible to notice the faded leaves but usually in the evening and in the morning they recover. If this does not happen, it could be a sign of the need for more abundant irrigation, which does not create stagnant water. If you want to get the

Blue Hydrangea: The pruning of blue hydrangea

Pruning is a very delicate phase that must be done with due attention, for an optimal result and correct growth of the plant. If the latter is located outside, pruning should be carried out at the end of winter in colder climates, so that the old and external branches protect the young internal ones from the cold, while in milder climates, pruning can be carried out at the end of flowering. If the plant is grown in pots and is located indoors, the recommended period for pruning is the end of summer or the beginning of autumn, in the months of September / October. Pruning must naturally concern the oldest, dry or damaged branches to allow the correct development of the young branches, which can be recognized because they have a bud at their top,

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