Violets are the state flower of New Jersey, but the multicolored hydrangea, now in full bloom, are the pride of many Garden State gardeners. But are your hydrangea blooms as healthy as they could be?

Violets are the state flower of New Jersey, but the multicolored hydrangea, now in full bloom, are the pride of many Garden State gardeners. But are your hydrangea blooms as healthy as they could be?

Rusty nails in the soil are said to help hydrangeas bloom. Photo: Franka Kruse-Gering/myHOMEBOOK/getty images An old gardening trick from grandmother’s time ...