Pocket Botanist
Check these first
- Observe the plant for a few days to see if it is leaning toward the light.
- Measure the distance between leaf nodes to see if they are stretching.
- Check if the plant has been pruned in the last year.
Likely causes
Insufficient Light
Most likelyHow to tell: The stems are long and thin with large gaps between the leaves. The plant leans heavily toward the nearest window.
What to do: Move the plant to a brighter location that gets morning sun or very bright indirect light. Rotate the pot every week to ensure all sides get equal exposure.
Lack of Pruning
PossibleHow to tell: The plant has old, woody stems that do not produce many leaves or flowers. It looks sparse and overgrown.
What to do: Prune the plant back after it finishes flowering to encourage bushier growth. Cut back the longest stems by one third to stimulate new side shoots.
Find out what's wrong with your bigleaf 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.
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When to worry
Legginess is rarely fatal but it makes the plant look unattractive and weak. It is normal for a hydrangea to have a few longer stems as it matures over several seasons.
Stopping it coming back
Provide adequate light and prune the plant annually to maintain a compact, full shape.
Keep your bigleaf hydrangea healthy from here
Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.
Questions people ask
- Will cutting back the stems help?
- Yes, pruning encourages the plant to branch out and grow more stems from the base. This results in a fuller, more compact hydrangea.
- Does my hydrangea need direct sun?
- It prefers morning sun or bright indirect light. Too much direct afternoon sun will burn the leaves, but too little light will make it leggy.
More problems with Bigleaf Hydrangea
- Why is my bigleaf hydrangea drooping?
- Why is my bigleaf hydrangea not flowering?
- What are the bugs on my bigleaf hydrangea?
- Why are my hydrangea leaves turning yellow?
- Why are my hydrangea leaf tips turning brown?
- Why are there spots on my hydrangea leaves?
- Why is my hydrangea losing its leaves?
- How do I fix root rot on my hydrangea?
- Why are my hydrangea leaves curling?
Back to the Bigleaf Hydrangea guide
This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.