Hydrangea Pics: Oklahoma and Hydrangeas on Pinterest

Hydrangea (/ha?'dre?nd?i?/;common labels hydrangea or hortensia) is a genus of 70-75 types of flowering plants native to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. Probably the greatest types diversity is within eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters high, but some are small trees and shrubs, and others lianas achieving up to 30 m (98 foot) by climbing up trees. They could be either evergreen or deciduous, although generally cultivated temperate varieties are all deciduous.Having been introduced to the Azores, H. macrophylla is currently very common, particularly on Faial, which is known as the "blue island" due to the vast number of hydrangeas present on the island.Life cycleHydrangea flowers are produced from planting season to late fall; they expand in flowerheads (corymbs or panicles) frequently at the ends of the stems.

Usually the flowerheads contain two types of bouquets: small non-showy blooms in the center or interior of the flowerhead, and large, showy plants with large colorful sepals (tepals). These showy bouquets are long in a engagement ring often, or to the surface of the tiny flowers. Plants in untamed populations typically have few to nothing of the showy plants, while cultivated hydrangeas have been selected and bred to have more of the larger type flowers.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which include the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead blossoms are large rounded flowerheads resembling pom-poms or, as the name implies, the mind of your mop. In contrast, lacecap flowers bear round, flat flowerheads with a center core of subdued, small blooms surrounded by outer bands of bigger blossoms having showy tepals or sepals.

The blossoms of some rhododendrons and viburnums can show up, at first glance, a lot like those of some hydrangeas.Colors and dirt acidityIn most types the blooms are white, however in some species (notably H. macrophylla), can be blue, red, green, light crimson, or dark crimson. In these varieties the colour is affected by the existence of light weight aluminum ions which are available or tangled up depending upon the garden soil pH. For H. h and macrophylla. serrata cultivars, the flower color can be determined by 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 rose pigments in the occurrence of aluminium ions which may be taken up into hyperaccumulating plants.[6] Minimizing the pH of potting soils or mixes usually does not change the flower color to blue, because these soils have no aluminum ions. The capability to blue or green a hydrangea is also affected by the cultivar. Some plants are selected for their ability to be blued, while others are bred and selected to be red, white or pink. The flower color of most other Hydrangea species is not affected by aluminum and can't be changed or shifted. Hydrangeas likewise have a nickname called 'Change Rose'.