Hydrangea (/ha?'dre?nd?i?/;common titles hydrangea or hortensia) is a genus of 70-75 kinds of flowering crops local to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. Certainly the greatest species diversity is within eastern Asia, china notably, Japan, and Korea. Most are shrubs 1 to 3 meters large, however, many are small trees, as well as others lianas achieving up to 30 m (98 feet) by climbing up trees and shrubs. They can be either evergreen or deciduous, although cultivated temperate species are all deciduous greatly.Having been introduced to the Azores, H. macrophylla is quite typical now, particularly on Faial, which is known as the "blue island" because of the multitude of hydrangeas present on the island.Life cycleHydrangea plants are created from planting season to late fall; they expand 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 blooms with large colourful sepals (tepals). These showy flowers are often expanded in a ring, or to the exterior of the small flowers. Plants in untamed populations have few to none of the showy flowers typically, while cultivated hydrangeas have been chosen and bred to have significantly more of the larger type blooms.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which includes the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead flowers are large spherical flowerheads resembling pom-poms or, as the name means, the mind of any mop. On the other hand, lacecap flowers bear round, flat flowerheads with a center core of subdued, small flowers surrounded by outer rings of larger flowers having showy sepals or tepals.
The flowers of some rhododendrons and viburnums can look, initially, a lot like those of some hydrangeas.Earth and colors acidityIn most varieties the flowers are white, however in some kinds (notably H. macrophylla), can be blue, red, green, light purple, or dark purple. In these species the color is damaged by the occurrence of aluminum ions which can be found or tied 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 produce flowers that are blue to purple typically, whereas an alkaline soil (pH above 7) will tie up aluminum ions and cause pink or red flowers.
This is the effect of a color change of the bloom pigments in the presence of aluminium ions which may be adopted into hyperaccumulating crops.[6] Bringing down the pH of potting soils or mixes usually does not change the blossom 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, pink or white. The flower color of most other Hydrangea species is not afflicted by aluminum and cannot be changed or shifted. Hydrangeas also have a nickname called 'Change Rose'.
This one has much greener leaf39;s than the other one, but I don39;t care
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Vander Giessen Nursery: Hydrangeas: When to Prune and How to Change
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