Hydrangea (Hydrangea common name) is a genus that includes about 100 species of flowering plants native to South and East Asia (from Japan to China, the Himalayas and Indonesia) and also in North and South America. Usually known by its common name of Hydrangeas.
Description
Hydrangea Most are shrubs 1-3 m tall, but some are small trees, and others lianas reaching up to 30 m by climbing up trees. They can be deciduous or evergreen, though the widely cultivated, which are temperate species are deciduous.
The Hydrangeas produce flowers from early spring until late fall, these are grouped into classes, at the end of the stems. Each individual flower hydrangea is relatively small, however, the color display is enhanced by a ring of modified bracts around each flower.
Its flowers can be pink, white, or blue, depending in part on soil pH. In relatively acidic soils (pH between 4.5 and 5) are blue flowers in alkaline soils (pH between 6 and 6.5) acquire the pink flowers, and in soils of intermediate acidity (pH around 5 5) white flowers grow.
You can force the pinkness of the flowers, using fertilizers rich in nitrogen and phosphorus and potassium-poor, whereas if you want blue flowers, fertilizer must be rich in potassium and low in nitrogen and phosphorus. Blue Flowering may also require the input of acidifying fertilizers such as ammonium sulphate, ammonium nitrate, potassium sulfate, etc.. You can also add aluminum sulfate if the above measures are insufficient.
The pink color is achieved with alkaline fertilizers, such as calcium nitrate.
The careful addition of sodium carbonate to the soil can produce a colorful bloom.
Hydrangeas are among the few plants that accumulate aluminum. Get the aluminum acid soils, and forms complexes in the flower that gives them their blue color.
Source: http://es.wikipedia.org/wiki/Hydrangea
See Also: Sending Flowers, Online Florist
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