Hydrangea (/ha?'dre?nd?i?/;common names hydrangea or hortensia) is a genus of 70-75 kinds of flowering plants indigenous to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. By far the greatest varieties diversity is eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters large, but some are small trees, among others lianas achieving up to 30 m (98 ft) by climbing up trees. They can be either deciduous or evergreen, although greatly cultivated temperate kinds are deciduous.Having been introduced to the Azores, H. macrophylla is now very common, particularly on Faial, which is recognized as the "blue island" due to the vast number of hydrangeas present on the island.Life cycleHydrangea bouquets are created from early spring to late fall; they expand in flowerheads (corymbs or panicles) most often at the ends of the stems.
Typically the flowerheads contain two types of flowers: small non-showy blooms in the center or interior of the flowerhead, and large, showy blooms with large brilliant sepals (tepals). These showy plants are lengthened in a diamond ring often, or to the surface of the tiny flowers. Plant life in outdoors populations typically have few to nothing of the showy blooms, while cultivated hydrangeas have been bred and preferred to have significantly more of the bigger type blooms.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which include the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead blooms are large spherical flowerheads resembling pom-poms or, as the name implies, the mind of the 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 viburnums and rhododendrons can look, initially, much like those of some hydrangeas.Colors and soil acidityIn most types the blossoms are white, however in some varieties (notably H. macrophylla), can be blue, red, red, light crimson, or dark crimson. In these kinds the color is damaged by the existence of metal ions which can be found or tangled up depending upon 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 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 result in pink or red flowers.
This is caused by a color change of the bloom pigments in the existence of aluminium ions which is often taken up into hyperaccumulating crops.[6] Bringing down the pH of potting soils or mixes usually does not change the rose color to blue, because these soils haven't any aluminum ions. The ability to blue or green a hydrangea is affected by the cultivar also. Some plants are selected because of their ability to be blued, while others are bred and selected to be red, pink or white. The flower color of all other Hydrangea species is not affected by aluminum and cannot be changed or shifted. Hydrangeas likewise have a nickname called 'Change Rose'.
Endless Summer’ Hydrangea: Does it live up to the hype?
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Picture and description of Hydrangea macrophylla 39;First White39;
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