Hydrangea's origins are in Japan. It was first introduced to the Western world in 1788. Some hydrangea, like the paniculata can be trained to grow as a tree and reach a height of 25 feet. Some varieties are known for their excellence as smaller dwarf varieties that can be pruned and trained to maintain a growth of three to six feet, without sacrificing the species fame for showy and profuse flowers and colourings.
The blue Danube has a very study cane that usually does not require stalking. Hydrangea growers select the Danube for its deep-blue colouring, compact growth and heavy production of flowers during early to late summer. Blue Danube is often kept indoors in containers, and as cut flowers. Soils with high alkalinity transform the blooms to pink. Acidic soils maintain and intensify blue blossom colourings.
The Hydrangea macrophylla 'Lanarth White' is one of the "lacecap" hydrangea varieties, so called because it features a small cluster of flowers surrounded by a ring of big, open flowers. The 'Lanarth White' bears pastel blue or pink edging on the white flowers and will grow to bushy width and height of 4 feet.
Berlin rabe is a member of the macrophylla hydrangea family. It stays compact and short, growing to a height of 3 feet. It is favoured for its large, pink clusters of flowers that keep long-lasting colour. Gardens also prefer Berlin rabe because it demonstrates a resistance to mildew and has rigorous, strong growth and development. In time, the flowers transform from pink to green.
Paris Rapa, a member of the macrophylla family, is often selected by those who prefer low-growing hydrangeas because it remains compact. This makes is a fine choice for small garden spaces. Paris Rapa produces fuchsia flowers that transform to green. It grows to a height of 3 feet and a width of 4 feet.
The snowball hydrangea grows as wide as 10 feet at full maturity but maintains a height of only 5 feet, which is somewhat short by hydrangea standards. It is grown for its true, white flowers, hence the name "snowball." It is a popular gift during the Christmas season to propagate indoors until spring planting when you can select a permanent home for the snowball hydrangea in the garden.
Hydrangea generally does quite well in U.S. Department of Agriculture Plant Hardiness Zones 5 to 9. Check the pH soil condition in your garden. White flowers display a green colouration if the pH is incorrect, and blue flowers will not be as vivid or even to turn pink. Consult with your local nursery for proper hydrangea guidance that is specific to your locale.
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