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Hydrangeas

Introduction

They are not really pot plants, rather it must be said that they are suitable for being grown in the open field and to be admired outside, perhaps in the garden. Nothing prevents them from planting them in pots for the first time and keeping them indoors for a while, although after the first flowering it is always better to transfer them to the garden and plant them on soil in open field. The plants we will talk about in our in-depth study are highly appreciated for their bearing and the variable color of their flowers. Their name is also used as a female name and history and literature often refer to women by the name of these plants. We are talking about hydrangeas, perennial plants with a climbing or shrubby habit originating from the Asian regions and the Americas.

Features


Hydrangeas include about eighty species native to Asia, especially from the regions of the Himalayas and America. Woody species with both shrubby and climbing habit, they can give life to flowering bushes and walls decorated with the vivid and intense colors of their flowers. Hydrangeas became important in Europe in the late 1700s and their name derives from a love story between a navigator and a woman called Hortense. The lover, returning from his trip to Asia, wanted to baptize these flowering plants with the name of the woman he loved. Hydrangeas belong to the Hydrangeaceae family and to the Hydrangea genus. These perennial, woody plants, both shrubby and climbing, have very thick stems each carrying three opposite leaves and with toothed lobes. The flowers of hydrangeas are grouped in spherical inflorescences called panicles or corymbs. The external flower parts are sterile, while the colored petals are actually formed by the sepals. These can be of various colors, from white to pink to red to blue. The color of hydrangea flowers depends not only on the species, but also on the characteristics of the soil. In contact with acid soils, some varieties produce blue flowers, while in alkaline soils the flowers are pink. but also from the characteristics of the terrain. In contact with acid soils, some varieties produce blue flowers, while in alkaline soils the flowers are pink. but also from the characteristics of the terrain. In contact with acid soils, some varieties produce blue flowers, while in alkaline soils the flowers are pink.

Variety


There are numerous varieties of hydrangea, although the best known species are those grown for ornamental purposes. These include hydrangea ortensis, hydrangea paniculata, hydrangea quercifolia, hydrangea sargentiana and hydrangea arborescens. Hydrangea ortensis, also called hydrangea macrophylla or hydrangea opuloides, has sterile pink inflorescences, with very small petals, and a semi-shrubby habit. This variety includes hydrangeas with pink flowers with open petals and very showy and with pink flowers with flat petals in the center of which there are inflorescences with closed petals. Hydrangea paniculata is a shrubby variety, about six meters tall. It has white flowers arranged in a pyramid. The flowers of hydrangea quercifolia are also white, small shrub species about one meter high. The flowers of this hydrangea, however, do not stay white for long, because when the plant is mature they turn pink. Hydrangea sargentiana is a variety that has lilac and white colored inflorescences. Lilac flowers are flat and fertile, while white ones are sterile. This plant can reach three meters in height. Hydrangea arborescens always has a shrubby habit and produces white spherical inflorescences.

Flowering

The flowering of orchids varies according to the species they belong to. Typically, all hydrangeas bloom between spring and summer. The different varieties of hydrangea ortensis, with red, white, blue and pink flowers bloom precisely during the time frame we have just indicated. Other varieties of hydrangea have sharper and more specific flowering periods. Hydrangea arborescens and hydrangea sargentiana, for example, bloom in the summer, around the month of July.

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