• As their name suggests, hydrangeas like water. Keep them moist, especially if they are planted in full sun.
• Don’t prune most hydrangeas, except for late-blooming varieties. Removing dead branches is, of course, always okay.
• Adding Holly-Tone in the spring will intensify the blue of some hydrangeas, particularly the popular ‘Nikko Blue’.
• Schizophragma hydrangoides (false hydrangea) is a good substitute for H. petiolaris and will stay closer to a wall.
• Cut hydrangeas dry beautifully in a vase. Just let the water evaporate.
The print version of this article appears with the headline: Hot for Hydrangeas.