a 'Limelight' panicle hydrangea is hardy in USDA zones 3 to 9, while a 'Nikko Blue' bigleaf hydrangea is hardy in zones 6 to 9). This difference affects when buds form. Panicle hydrangeas go ...
One of the keys to bright, healthy hydrangeas is to fertilize them properly each spring. Here's what you should do.