Assertion: hydrangea's flower | /r/HasProperty | changed
Facets:
value: by adding aluminum sulphate
type: MANNER
Source sentences:
text: While it is a common perception that the color of a hydrangea flowers depends on the soil’s acidity, or pH, only the flowers of the bigleaf hydrangea (Hydrangea macrophylla) can be changed using soil amendments such as aluminum sulfate.
text: The flowers can be changed to blue with acidic soils or by adding aluminum sulphate.