Pocket Botanist
Check these first
- Measure how many hours of direct sun the plant gets.
- Check if nearby trees have grown and started shading the area.
- Recall if you have added fertilizer to the soil recently.
Likely causes
Insufficient sunlight
Most likelyHow to tell: The stems are long, weak, and lean heavily toward the nearest light source. The plant loses its signature upright, vase shape.
What to do: Move the plant to a spot that gets at least 6 to 8 hours of direct sun daily. If it is already in the ground, consider transplanting it to a sunnier location in the spring.
Excessive fertilizer
PossibleHow to tell: The plant grows very fast but the stems are soft and cannot support their own weight. This often happens if you add too much compost or nitrogen.
What to do: Stop fertilizing immediately. Little bluestem prefers lean, poor soil and does not need extra nutrients.
Find out what's wrong with your little bluestem
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
It is normal for the plant to spread slightly as it ages, but it should not be falling over. If it is completely flat, it is not getting enough light.
Stopping it coming back
Always plant this grass in full sun and avoid adding any fertilizer to the planting hole.
Little bluestem: leggy growth? Check yours with a photo
Every plant is a little different. Take a photo of your little bluestem 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
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Questions people ask
- Can I prune it to make it stand up?
- You can trim it back in late spring to encourage denser growth, but it will not fix a lack of sun.
- Does it need staking?
- No. A healthy Little bluestem in the right light will be strong enough to stand on its own.
More problems with Little bluestem
Back to the Little bluestem guide
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.