There are a number of common names for the Hydrangea. This flower is part of a genus of about 70 to 75 species of flowering plants. Hydrangeas are a native to southern and eastern Asia as well as North and South America. These species can range from plants as small as 1 meter tall and others 30 metres which is accomplished by the climbing varieties.
Toxic if Eaten
Hydrangeas are toxic if eaten. Oddly enough, this has not stopped some cultures from making teas or smoking the plant.
Hydrangeas will bloom from early spring to late autumn. The exact time your flower bloom will depend on a variety of factors such as weather, water conditions and soil conditions.
Two Main Types of Hydrangeas
Of the many types of hydrangeas there are only two flower arrangements. The first resembles a mop-head or a cheerleaders pom-poms. As you may have guessed these are called Mophead flowers. The second type of flower is similar but has a core that is surrounded by a number of outer rings of flat flower heads.
How to change the color of your hydrangeas
Most Hydrangea species are white but there are a number of Hydrangea flowers that change with the ph of the soil. These flowers can include blue, red, pink and purple. Acidic soils will generally produce blue flowers, neural soils will produce white petals and alkaline soils will produce pink flowers.
Changing a hydrangea from pink to blue will require the right amout of aluminum in the soil. Changing from blue to pink means subtracting aluminum from the soil. Before you start keep the following in mind.
WHITE HYDRANGEAS can NOT be changed to pink or blue by the grower.
If you live in a hot climate you will probably never see a “true red” hydrangea
To decrease the aluminum in the soil (change to Pink) try adding dolomitic lime several times a year. This will help rais the pH. ideally you want to have a pH of about 6.o. Anything above 6.4 and your hydrangea may experience an iron deficiency.
To increase aluminum in the soil (change to Blue) aluminum sulfate may be added to the soil. Be careful wehn adding the solution as too much may burn the roots. It is recommended that you water your plants a few times a year with 1 Tbsl of solution to every gallon of water.