A big, sky blue hydrangea is absolutely breathtaking. Get your bigleaf hydrangeas to go blue by increasing the acidity of the soil. Adding soil sulfur is one way to do this.
Here's a hint: Bigleaf hydrangeas can be shy bloomers. Most bloom on last-year's growth, so if you need to prune them, do so right after they finish flowering.
Name: Hydrangea macrophylla
Growing Conditions: Part shade and moist, well-drained soil. Don't let bigleaf hydrangeas get too dry.
Size: To 7 feet tall and wide, depending on variety
Zones: 6-9
Grow it with: Blue bigleaf hydrangeas look stunning when paired with white varieties such as Annabelle hydrangea or oakleaf hydrangea.
Click here to learn more about growing hydrangeas
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