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Do you feed hydrangeas other than the aluminum sulfate to turn them blue. If so when - also how do you prune them and when. I live in Maine
Submitted by berkshirejean



Thanks for writing. You can encourage hydrangeas to go blue by adding sulfur or aluminum sulfate to the soil; do this any time in spring, summer, or fall.


As far as how to prune them: The best time is right after they finish blooming. Shortly after the blooms fully fade, the plants begin making next year's flowers --- so pruning in fall, winter, or spring could result in cutting the blooms off before they develop. Learn more:


---Justin, Senior Garden Editor,

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how come my hydranres do not flower this is the second year?
Submitted by mrayburn