varying pH levels

The roses are almost gone, but the hydrangeas are in full bloom. While I love, love, love the flowers; I can't help the nagging feeling of the shift. The summer heat lingers  and the golden sun of June isn't quite as bright. The overgrowth of green and turning leaves. The air is hazy... I wish New York fell into the cool fall of the Midwest, but alas this place seems to have two seasons. Cold and Hot with a couple of weeks of Mild in between. But New York makes up in other ways. It's coming on five years of being here. Isn't that crazy?! It's been five years of "being a grown up". So much choice, so many thoughts, and so much change.Apparently their color is based on the pH levels of soil.