With immense flower heads, hydrangeas flaunt an old-fashioned charm that is hard to resist. Colors beguile with clear blue, vibrant pink, frosty white, lavender, and rose blossoms—sometimes all blooming on the same plant!
For the first year or two after planting and during any drought, be sure hydrangeas get plenty of water. Leaves will wilt if the soil is too dry, and flowering will be hampered by a lack of water.
If your soil is rich, you may not need to fertilize hydrangeas. If your soil is light or sandy, it’s best to feed the plants once a year in late winter or spring.
Hydrangeas love full sunlight at morning and partly shade during afternoon.
Also note that it’s easier to change blue flowers to pink than pink to blue.
It’s not every hydrangea that changes colour. cultivars change color based on the soil pH.
Acidic soils with a pH of less than 5.5 produce blue flowers; soils with a pH greater than 5.5 produce pink flowers. White flowers are not affected by pH.
If you're growing hydrangeas, use coffee grounds to affect their color. Coffee grounds add extra acidity to the soil around hydrangeas. On a chemical level, this increased acidity makes it easier for the plant to absorb naturally occurring aluminum in the dirt. The effect is pretty blue clusters of flowers.