Hydrangea Pics: purple hydrangea

Hydrangea (/ha?'dre?nd?i?/;common names hydrangea or hortensia) is a genus of 70-75 types of flowering vegetation local to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. By far the greatest kinds diversity is eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters large, however, many are small trees, and more lianas reaching up to 30 m (98 foot) by climbing up trees. They could be either evergreen or deciduous, although extensively cultivated temperate species are deciduous.Having been introduced to the Azores, H. macrophylla is currently very common, on Faial particularly, which is recognized as the "blue island" because of the multitude of hydrangeas present on the island.Life cycleHydrangea blooms are created from early spring to late fall; they grow in flowerheads (corymbs or panicles) most often at the ends of the stems.

Usually the flowerheads contain two types of blossoms: small non-showy blooms in the guts or interior of the flowerhead, and large, showy flowers with large colourful sepals (tepals). These showy plants are lengthened in a engagement ring often, or to the exterior of the small flowers. Vegetation in crazy populations have few to nothing of the showy plants typically, while cultivated hydrangeas have been bred and decided on to have significantly more of the bigger type bouquets.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which include the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead blossoms are large round flowerheads resembling pom-poms or, as the name suggests, the relative head of the mop. On the other hand, lacecap flowers bear round, flat flowerheads with a center core of subdued, small blooms encircled by outer rings of bigger blooms having showy tepals or sepals.

The bouquets of some rhododendrons and viburnums can seem, at first glance, much like those of some hydrangeas.Garden soil and colors acidityIn most kinds the plants are white, but in some kinds (notably H. macrophylla), can be blue, red, red, light purple, or dark crimson. In these kinds the colour is affected by the presence of light weight aluminum ions which can be found or tangled up depending upon the garden soil pH. For H. h and macrophylla. serrata cultivars, the flower color can be dependant on the relative acidity of the soil: an acidic soil (pH below 7), will supply aluminum ions and typically produce flowers that are blue to purple, whereas an alkaline soil (pH above 7) will tie up aluminum ions and bring about pink or red flowers.

This is the effect of a color change of the bloom pigments in the presence of aluminium ions which is often adopted into hyperaccumulating plants.[6] Cutting down the pH of potting soils or mixes usually does not change the bloom color to blue, because these soils haven't any aluminum ions. The ability to blue or green a hydrangea is also affected by the cultivar. Some plants are selected for his or her 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 afflicted by aluminum and can't be changed or shifted. Hydrangeas also have a nickname called 'Change Rose'.