Endless Summer can bloom in shades of pink or blue. How can I achieve the color I want?
The color of bloom is dependent on the pH of your soil. If you desire pink blooms, in most cases, you need not do anything, as neutral to alkaline (6.0 to 7.0) soils will produce pink blooms. If you do not know the pH of your soil, most garden centers carry a soil test kit which will help you determine the acidity of your soil. If you desire blue blooms, increase the acidity (5.0 to 5.8) of your soil. We recommend adding Soil Acidifier or elemental sulfur to your soil before planting your hydrangea. If you have used or are using aluminum sulfate, be sure to follow the package instructions carefully. Adding too much aluminum sulfate to your soil can be harmful since aluminum does not move through the soil. This can create a condition called aluminum toxicity which can be very harmful to your plants.
