Hydrangea (/ha?'dre?nd?i?/;common labels hydrangea or hortensia) is a genus of 70-75 types of flowering crops native to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. By far the greatest species diversity is within eastern Asia, notably China, Japan, and Korea. The majority are shrubs 1 to 3 meters tall, but some are small trees and shrubs, yet others lianas achieving up to 30 m (98 ft) by climbing up trees and shrubs. They can be either evergreen or deciduous, although cultivated temperate species are all deciduous extensively.Having been introduced to the Azores, H. macrophylla is now very common, particularly on Faial, which is known as the "blue island" because of the vast number of hydrangeas present on the island.Life cycleHydrangea plants are created from early spring to late fall months; they increase in flowerheads (corymbs or panicles) frequently at the ends of the stems.
Typically the flowerheads contain two types of bouquets: small non-showy plants in the center or interior of the flowerhead, and large, showy flowers with large colorful sepals (tepals). These showy bouquets are often lengthened in a diamond ring, or to the surface of the small flowers. Plants in untamed populations routinely have few to nothing of the showy flowers, while cultivated hydrangeas have been bred and decided on to have more of the bigger type flowers.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which includes the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead plants are large round flowerheads resembling pom-poms or, as the name suggests, the mind of your 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 seem, initially, similar to those of some hydrangeas.Colors and earth acidityIn most varieties the flowers are white, however in some kinds (notably H. macrophylla), can be blue, red, pink, light crimson, or dark purple. In these varieties the color is affected by the occurrence of aluminum ions which can be found or tied up depending upon the garden soil pH. For H. macrophylla and H. 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 produce flowers that are blue to purple typically, whereas an alkaline soil (pH above 7) will tie up aluminum ions and lead to pink or red flowers.
This is caused by a color change of the rose pigments in the presence of aluminium ions which is often adopted into hyperaccumulating plant life.[6] Cutting 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 pink a hydrangea is influenced by the cultivar also. Some plants are selected for his or her ability to be blued, while others 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 likewise have a nickname called 'Change Rose'.
for love of hydrangeas Berkeley Garden Coach
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