Do smooth hydrangeas need special food to bloom?

They do not need special food, but a balanced fertilizer in early spring can provide the energy needed for a strong display. Avoid high nitrogen formulas that focus only on green growth.

Will cold weather stop them from blooming?

Since smooth hydrangeas bloom on new wood, they are very hardy and late frosts rarely stop them from flowering. They are much more reliable than bigleaf varieties in cold climates.

Why is my smooth hydrangea not blooming? Causes and fixes

Check these first

Verify that you are pruning in late winter.
Assess the amount of sunlight the plant receives daily.
Check for aphid infestations that might be sapping the plant's energy.

Likely causes

Improper Pruning
Most likely
How to tell: You pruned the plant in the spring after new growth started, removing the buds that were about to open. The plant looks healthy and leafy but has no flower heads.
What to do: Prune your smooth hydrangea in late winter or very early spring before new growth appears. This ensures the plant has the full season to develop buds on the new stems.
Insufficient Light
Possible
How to tell: The plant is growing in deep shade and looks leggy or stretched out. It produces plenty of leaves but never forms flower buds.
What to do: Move the plant to a location that receives at least 4 to 6 hours of bright, indirect light. If moving is not possible, trim back overhanging tree branches to let more light reach the plant.

Other plants that won't flower

Find out what's wrong with your smooth hydrangea

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

When to worry

It is normal for a very young plant to skip blooming during its first year in the ground. Worry if a mature plant fails to bloom for two consecutive seasons.

Stopping it coming back

Provide consistent light and prune only during the dormant winter season. Avoid heavy nitrogen fertilizers which encourage leaves at the expense of flowers.

Smooth Hydrangea: not flowering? Check yours with a photo

Every plant is a little different. Take a photo of your smooth hydrangea and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

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Questions people ask

Do smooth hydrangeas need special food to bloom?: They do not need special food, but a balanced fertilizer in early spring can provide the energy needed for a strong display. Avoid high nitrogen formulas that focus only on green growth.
Will cold weather stop them from blooming?: Since smooth hydrangeas bloom on new wood, they are very hardy and late frosts rarely stop them from flowering. They are much more reliable than bigleaf varieties in cold climates.

Why is my smooth hydrangea not blooming?