Pocket Botanist
Check these first
- Feel the soil to see if it is dry and crumbly.
- Check the time of day to see if the plant recovers in the evening.
- Examine the roots for any signs of damage or rot.
Likely causes
Underwatering
Most likelyHow to tell: The soil is bone dry and the leaves look wilted or curled. The plant usually perks up quickly after a good watering.
What to do: Give the plant a deep soak until the soil is moist several inches down. If it is very hot, you may need to water every 3 to 5 days.
Heat stress
PossibleHow to tell: The plant droops during the hottest part of the day but recovers by evening. This is common during extreme summer heat.
What to do: Ensure the plant is getting enough water to support its growth. If the heat is extreme, a light layer of mulch can help keep the roots cool.
Find out what's wrong with your large crabgrass
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
Drooping during the heat of the day is normal for many grasses. Worry if the plant stays wilted even after the sun goes down and the temperature drops.
Stopping it coming back
Water deeply and consistently to encourage a strong root system that can handle dry spells.
Large crabgrass: drooping? Check yours with a photo
Every plant is a little different. Take a photo of your large crabgrass 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
- How much water does crabgrass need?
- Once established, it is quite tough, but it prefers moist soil. Aim to water every 3 to 7 days depending on your local heat.
- Should I water in the morning or evening?
- Morning is best. It allows the plant to hydrate before the heat of the day and lets the leaves dry off.
Guides to these causes
More problems with Large crabgrass
Back to the Large crabgrass 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.