Hydrangea (/ha?'dre?nd?i?/;common brands hydrangea or hortensia) is a genus of 70-75 species of flowering crops local to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. Certainly the greatest varieties diversity is in eastern Asia, china notably, Japan, and Korea. The majority are shrubs 1 to 3 meters high, however, many are small trees, and others lianas achieving up to 30 m (98 ft) by climbing up trees. They could be either deciduous or evergreen, though the greatly cultivated temperate species are all deciduous.Having been introduced to the Azores, H. macrophylla is now very common, on Faial particularly, which is recognized as the "blue island" due to the vast number of hydrangeas present on the island.Life cycleHydrangea bouquets are produced from planting season to late fall months; they increase in flowerheads (corymbs or panicles) most often at the ends of the stems.
Typically the flowerheads contain two types of blossoms: small non-showy plants in the center or interior of the flowerhead, and large, showy blossoms with large bright colored sepals (tepals). These showy bouquets are prolonged in a wedding ring often, or to the exterior of the small flowers. Vegetation in wild populations have few to nothing of the showy plants typically, while cultivated hydrangeas have been preferred and bred to have significantly more of the bigger type plants.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which includes the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead blooms are large rounded flowerheads resembling pom-poms or, as the name suggests, the brain of your mop. In contrast, lacecap flowers bear round, flat flowerheads with a center core of subdued, small blooms bounded by outer rings of larger bouquets having showy tepals or sepals.
The flowers of some viburnums and rhododendrons can show up, at first glance, just like those of some hydrangeas.Land and colors acidityIn most kinds the plants are white, however in some kinds (notably H. macrophylla), can be blue, red, pink, light purple, or dark crimson. In these kinds the color is influenced by the presence of lightweight aluminum ions which can be found or tangled up depending after the land pH. For H. macrophylla and H. serrata cultivars, the flower color can be determined by the relative acidity of the soil: an acidic soil (pH below 7), will have available aluminum ions and produce flowers that are blue to purple typically, whereas an alkaline soil (pH above 7) will tie up aluminum ions and result in pink or red flowers.
This is the effect of a color change of the blossom pigments in the existence of aluminium ions which may be adopted into hyperaccumulating plants.[6] Cutting down the pH of potting soils or mixes usually will not change the rose color to blue, because these soils have no aluminum ions. The capability to blue or green a hydrangea is influenced by the cultivar also. Some plants are selected for their ability to be blued, while some are bred and selected to be red, white or pink. The flower color of all other Hydrangea species is not damaged by aluminum and cannot be changed or shifted. Hydrangeas also have a nickname called 'Change Rose'.
Pink hydrangea flowers blooming in Louisville, Kentucky, USA June
Pink Hydrangea
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Pink hydrangea for bridal shower centerpieces
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